(bug 18571) Purging image should always clear metadata cache. Sometimes the metadata...

[lhc/web/wiklou.git] / RELEASE-NOTES

= MediaWiki release notes =

Security reminder: MediaWiki does not require PHP's register_globals
setting since version 1.2.0. If you have it on, turn it *off* if you can.

== MediaWiki 1.15 ==

THIS IS NOT A RELEASE YET

MediaWiki is now using a "continuous integration" development model with
quarterly snapshot releases. The latest development code is always kept
"ready to run", and in fact runs our own sites on Wikipedia.

Release branches will continue to receive security updates for about a year
from first release, but nonessential bugfixes and feature developments
will be made on the development trunk and appear in the next quarterly release.

Those wishing to use the latest code instead of a branch release can obtain
it from source control: http://www.mediawiki.org/wiki/Download_from_SVN

=== Configuration changes in 1.15 ===

* Added $wgNewPasswordExpiry, to specify an expiry time (in seconds) to
  temporary passwords
* Added $wgUseTwoButtonsSearchForm to choose the Search form behavior/look
* Added $wgNoFollowDomainExceptions to allow exempting particular domain names
  from rel="nofollow" on external links
* (bug 12970) Brought back $wgUseImageResize.
* Added $wgRedirectOnLogin to allow specifying a specifc page to redirect users
  to upon logging in (ex: "Main Page")
* Add $wgExportFromNamespaces for enabling/disabling the "export all from 
  namespace" option (disabled by default)
* (bug 18222) $wgMinimalPasswordLength default is now 1
* $wgSessionHandler can be used to configure session.save_handler

=== New features in 1.15 ===

* (bug 2242) Add an expiry time to temporary passwords
* (bug 9947) Add PROTECTIONLEVEL parser function to return the protection level
  for the current page for a given action
* (bug 17002) Add &minor= and &summary= as parameters in the url when editing,
  to automatically add a summary or a minor edit.
* (bug 16852) padleft and padright now accept multiletter pad characters
* When using 'UserCreateForm' hook to add new checkboxes into
  Special:UserLogin/signup, the messages can now contain HTML to allow
  hyperlinking to the site's Terms of Service page, for example
* Add new hook 'UserLoadFromDatabase' that is called while loading a user
  from the database.
* (bug 17045) Options on the block form are prefilled with the options of the
  existing block when modifying an existing block.
* (bug 17055) "(show/hide)" links to Special:RevisionDelete now use a CSS class
  rather than hardcoded HTML tags
* Added new hook 'WantedPages::getSQL' into SpecialWantedpages.php to allow
  extensions to alter the SQL query which is used to get the list of wanted
  pages
* (bugs 16957/16969) Add show/hide to preferences for RC patrol options on
  specialpages
* (bug 11443) Auto-noindex user/user talk pages for blocked user
* (bug 11644) Add $wgMaxRedirects variable to control how many redirects are
  recursed through until the "destination" page is reached.
* Add $wgInvalidRedirectTargets variable to prevent redirects to certain
  special pages.
* Use HTML5 rel attributes for some links, where appropriate
* Added optional alternative Search form look - Go button & Advanced search
  link instead of Go button & Search button
* (bug 2314) Add links to user custom CSS and JS to Special:Preferences
* More helpful error message on raw page access if PHP_SELF isn't set
* (bug 13040) Gender switch in user preferences
* (bug 13040) {{GENDER:}} magic word for interface messages
* (bug 3301) Optionally sort user list according to account creation time
* Remote description pages for foreign file repos are now fetched in the
  content language.
* (bug 17180) If $wgUseFileCache is enabled, $wgShowIPinHeader is automatically
  set to false.
* (bug 16604) Mark non-patrolled edits in feeds with "!"
* (bug 16604) Show title/rev in IRC for patrol log
* (bug 16854) Whether a page is being parsed as a preview or section preview
  can now be determined and set with ParserOptions.
* Wrap message 'confirmemail_pending' into a div with CSS classes "error" and
  "mw-confirmemail-pending"
* (bug 8249) The magic words for namespaces and pagenames can now be used as
  parser functions to return the desired namespace or normalized title/title
  part for a given title.
* (bug 17110) Styled #mw-data-after-content in cologneblue.css to match the
  rest of the font
* (bug 7556) Time zone names in signatures lack i18n
* (bug 3311) Automatic category redirects
* (bug 17236) Suppress 'watch user page link' for IP range blocks
* Wrap message 'searchresulttext' (Special:Search) into a div with
  class "mw-searchresult"
* (bug 15283) Interwiki imports can now fetch included templates
* Treat svn:// URLs as external links by default
* New function to convert namespace text for display (only applies on wiki with
  LanguageConverter class)
* (bug 17379) Contributions-title is now parsed for magic words.
* Preprocessor output now cached in memcached.
* (bug 14468) Lines in classic RecentChanges and Watchlist have classes
  "mw-line-odd" and "mw-line-even" to make styling using css possible.
* (bug 17311) Add a note beside the gender selection menu to tell users that
  this information will be public
* Localize time zone regions in Special:Preferences
* Add NUMBEROFACTIVEUSERS magic word, which is like NUMBEROFUSERS, but uses
  the active users data from site_stats.
* Add a <link rel="canonical"> tag on redirected page views
* Replace hardcoded '...' as indication of a truncation with the
  'ellipsis' message
* Wrap warning message 'editinginterface' into a div with class
  'mw-editinginterface'
* (bug 17497) Oasis opendocument added to mime.types
* Remove the link to Special:FileDuplicateSearch from the "file history" section
  of image description pages as the list of duplicated files is shown in the 
  next section anyway.
* Added $wgRateLimitsExcludedIPs, to allow specific IPs to be whitelisted from
  rate limits.
* (bug 14981) Shared repositories can now have display names, located at
  Mediawiki:Shared-repo-name-REPONAME, where REPONAME is the name in 
  $wgForeignFileRepos
* Special:ListUsers: Sort list of usergroups by alphabet
* (bug 16762) Special:Movepage now shows a list of subpages when possible
* (bug 17585) Hide legend on Special:Specialpages from non-privileged users
* Added $wgUseTagFilter to control enabling of filter-by-change-tag
* (bug 17291) MediaWiki:Nocontribs now has an optional $1 parameter for the
  username
* Wrap special page summary message '$specialPageName-summary' into a div
  with class 'mw-specialpage-summary'
* $wgSummarySpamRegex added to handle edit summary spam. This is used *instead*
  of $wgSpamRegex for edit summary checks. Text checks still use $wgSpamRegex.
* New function to convert content text to specified language (only applies on
  wiki with LanguageConverter class)
* (bug 17844) Redirect users to a specific page when they log in, see 
  $wgRedirectOnLogin
* Added a link to Special:UserRights on Special:Contributions for privileged
  users
* (bug 10336) Added new magic word {{REVISIONUSER}}, which displays the editor
  of the displayed revision's author user name
* LinkerMakeExternalLink now has an $attribs parameter for link attributes and 
  a $linkType parameter for the type of external link being made
* (bug 17785) Dynamic dates surrounded with a <span> tag, fixing sortable tables
  with dynamic dates.
* (bug 4582) Provide preference-based autoformatting of unlinked dates with the
  dateformat parser function.
* (bug 17886) Special:Export now allows you to export a whole namespace (limited
  to 5000 pages)
* (bug 17714) Limited TIFF upload support now built in if 'tif' extension is
  enabled. Image width and height are now recognized, and when using
  ImageMagick, optional flattening to PNG or JPEG for inline display can be
  enabled by setting $wgTiffThumbnailType
* Renamed two input IDs on Special:Log from 'page' and 'user' to 'mw-log-page'
  and 'mw-log-user', respectively
* Added $wgInvalidUsernameCharacters to disallow certain characters in
  usernames during registration (such as "@")
* Added $wgUserrightsInterwikiDelimiter to allow changing the delimiter
  used in Special:UserRights to denote the user should be searched for
  on a different database
* Add a class if 'missingsummary' is triggered to allow styling of the summary
  line
* Add CSS defintion of the 'wikitable' class to shared.css
* (bug 17163) Added MediaWiki:Talkpageheader which will be displayed when
  viewing talk pages
* Add group convertsion support for LanguageConverter. New magic word
  "{{GROUPCONVERT:xxx}}" enabled for this new feature. You can set related
  conversion rules in [[MediaWiki:Groupconversiontable-xxx/language_code]].
* Superfluous border="0" removed from images
* Added new hook 'MessageCacheReplace' into MessageCache.php. For instance 
  to allow extensions to update caches in similar way as MediaWiki invalidates
  a cached MonoBook sidebar
* Special:AllPages: Move hardcoded styles from code to CSS
* (bug 6092) Add parser function equivalents of {{REVISIONID}},
  {{REVISIONTIMESTAMP}}  (and friends) and {{REVISIONUSER}} magic words
* (bug 18529) New hook: SoftwareInfo for adding information about the software
  to Special:Version
* Added $wgExtPGAlteredFields to allow extensions to easily alter the data 
  type of columns when using the Postgres backend.
* (bug 16950) Show move log when viewing/creating a deleted page


=== Bug fixes in 1.15 ===
* (bug 16968) Special:Upload no longer throws useless warnings.
* (bug 17000) Special:RevisionDelete now checks if the database is locked
  before trying to delete the edit.
* (bug 16852) padleft and padright now handle multibyte characters correctly
* (bug 17010) maintenance/namespaceDupes.php now add the suffix recursively if
  the destination page exists
* (bug 17035) Special:Upload now fails gracefully if PHP's file_uploads has
  been disabled
* Fixing the caching issue by using -{T|xxx}- syntax (only applies on wiki with
  LanguageConverter class)
* Improving the efficiency by using -{A|xxx}- syntax (only applies on wiki with
  LanguageConverter class)
* (bug 17054) Added more descriptive errors in Special:RevisionDelete
* (bug 11527) Diff on page with one revision shows "Next" link to same diff
* (bug 8065) Fix summary forcing for new pages
* (bug 10569) redirects to Special:Mypage and Special:Mytalk are no longer
  allowed by default. Change $wgInvalidRedirectTargets to re-enable.
* (bug 3043) Feed links of given page are now preceded by standard feed icon
* (bug 17150) escapeLike now escapes literal \ properly
* Inconsistent use of sysop, admin, administrator in system messages changed
  to 'administrator'
* (bug 14423) Check block flag validity for block logging
* DB transaction and slave-lag avoidance tweaks for Email Notifications
* (bug 17104) Removed [Mark as patrolled] link for already patrolled revisions
* (bug 17106) Added 'redirect=no' and 'mw-redirect' class to redirects at
  "user contributions"
* Rollback links on new pages removed from "user contributions"
* (bug 15811) Re-upload form tweaks: license fields removed, destination locked,
  comment label uses better message
* Whole HTML validation ($wgValidateAllHtml) now works with external tidy
* Parser tests no longer fail when $wgExternalLinkTarget is set in
  LocalSettings
* (bug 15391) catch DBQueryErrors on external storage insertion. This avoids
  error messages on save were the edit in fact is saved.
* (bug 17184) Remove duplicate "z" accesskey in MonoBook
* Parser tests no longer fail when $wgAlwaysUseTidy is set in LocalSettings.php
* Removed redundant dupe warnings on reupload for the same title. Dupe warnings
  for identical files at different titles are still given.
* Add 'change tagging' facility, where changes can be tagged internally with
  certain designations, which are displayed on various summaries of changes,
  and the entries can be styled with CSS.
* (bug 17207) Fix regression breaking category page display on PHP 5.1
* Categoryfinder utility class no longer fails on invalid input or gives wrong
  results for category names that include pseudo-namespaces
* (bug 17252) Galician numbering format
* (bug 17146) Fix for UTF-8 and short word search for some possible MySQL
  configs
* (bug 7480) Internationalize database error message
* (bug 16555) Number of links to mediawiki.org scaled back on post-installation
* (bug 14938) Removing a section no longer leaves excess whitespace
* (bug 17304) Fixed fatal error when thumbnails couldn't be generated for file
  history
* (bug 17283) Remove double URL escaping in show/hide links for log entries
  and RevisionDeleteForm::__construct
* (bug 17105) Numeric table sorting broken
* (bug 17231) Transcluding special pages on wikis using language conversion no
  longer affects the page title
* (bug 6702) Default system messages updated/improved
* (bug 17190) User ID on preference page no longer has delimeters
* (bug 17341) "Powered by MediaWiki" should be on the left on RTL wikis
* (bug 17404) "userrights-interwiki" right was missing in User::$mCoreRights
* (bug 7509) Separation strings should be configurable
* (bug 17420) Send the correct content type from action=raw when the HTML file 
  cache is enabled.
* (bug 12746) Do not allow new password e-mails when wiki is in read-only mode
* (bug 17478) Fixed a PHP Strict standards error in
  maintenance/cleanupWatchlist.php
* (bug 17488) RSS/Atom links in left toolbar are now localized in classic skin
* (bug 17472) use print <<<EOF in maintenance/importTextFile.php
* Special:PrefixIndex: Move table styling to shared.css, add CSS IDs to tables
  use correct message 'allpagesprefix' for input form label, replace _ with ' '
  in next page link
* (bug 17506) Exceptions within exceptions now respect $wgShowExceptionDetails
* Fixed excessive job queue utilisation
* File dupe messages for remote repos are now shown only once.
* (bug 14980) Messages 'shareduploadwiki' and 'shareduploadwiki-desc' are now
  used as a parameter in 'sharedupload' for easier styling and customization.
* (bug 17482) Formatting error in Special:Preferences#Misc (Opera)
* (bug 17556) <link> parameters in Special:Contributions feeds (RSS and Atom)
  now point to the actual contributors' feed.
* ForeignApiRepos now fetch MIME types, rather than trying to figure it locally
* Special:Import: Do not show input field for import depth if
  $wgExportMaxLinkDepth == 0
* (bug 17570) $wgMaxRedirects is now correctly respected when following
  redirects (was previously one more than $wgMaxRedirects)
* (bug 16335) __NONEWSECTIONLINK__ magic word to suppress new section link.
* (bug 17581) Wrong index name in PostgreSQL's updater: was rc_timestamp_nobot,
  changed to rc_timestamp_bot
* (bug 17437) Fixed incorrect link to web-based installer
* (bug 17538) Use shorter URLs in <link> elements
* (bug 13778) Hidden input added to the search form so that using the Enter key
  on IE will do a fulltext search like clicking the button does
* (bug 1061) CSS-added icons next to links display through the text and makes
  it unreadable in RTL
* Special:Wantedtemplates now works on PostgreSQL
* (bug 14414) maintenance/updateSpecialPages.php no longer throws error with
  PostgreSQL
* (bug 17546) Correct Tongan language native name is "lea faka-Tonga"
* (bug 17621) Special:WantedFiles has no link to Special:Whatlinkshere
* (bug 17460) Client ecoding is now correctly set for PostgreSQL
* (bug 17648) Prevent floats from intruding into edit area in previews if no
  toolbar present
* (bug 17692) Added (list of members) link to 'user' in Special:Listgrouprights
* (bug 17707) Show file destination as plain text if &wpForReUpload=1
* (bug 10172) Moved setting of "changed since last visit" flags out of the job
  queue
* (bug 17761) "show/hide" link in page history in now works for the first
  displayed revision if it's not the current one
* (bug 17722) Fix regression where users are unable to change temporary
  passwords
* (bug 17799) Special:Random no longer throws a database error when a non-
  namespace is given, silently falls back to NS_MAIN
* (bug 17751) The message for bad titles in WantedPages is now localized
* (bug 17860) Moving a page in the "MediaWiki" namespace using SuppressRedirect
  no longer corrupts the message cache
* (bug 17900) Fixed User Groups interface log display after saving groups.
* (bug 17897) Fixed string offset error in <pre> tags
* (bug 17778) MediaWiki:Catseparator can now have HTML entities
* (bug 17676) Error on Special:ListFiles when using Postgres
* Special:Export doesn't use raw SQL queries anymore
* (bug 14771) Thumbnail links to individual DjVu pages have two no longer have
  two "page" parameters
* (bug 17972) Special:FileDuplicateSearch form now works correctly on wikis that
  don't use PathInfo or short urls
* (bug 17990) trackback.php now has a trackback.php5 alias and works with 
  $wgScriptExtension
* (bug 14990) Parser tests works again with PostgreSQL
* (bug 11487) Special:Protectedpages doesn't list protections with pr_expiry
  IS NULL
* (bug 18018) Deleting a file redirect leaves behind a malfunctioning redirect
* (bug 17537) Disable bad zlib.output_compression output on HTTP 304 responses
* (bug 11213) [edit] section links in printable version no longer appear when
  you cut-and-paste article text
* (bug 17405) "Did you mean" to mirror Go/Search behavior of original request
* (bug 18116) 'edittools' is now output identically on edit and upload pages
* (bug 17241) The diffonly URI parameter should cascade to "Next edit" and
  "Previous edit" diff links
* (bug 16823) 'Sidebar search form should not use Special:Search view URL as
  target'
* (bug 16343) Non-existing, but in use, category pages can be "go" match hits
* (bug 18031) Make namespace selector on Special:Export remember the previous 
  selection
* The svn-version version numbers on Special:Version have been removed
* (bug 17374) Special:Export no longer exports two copies of the same page
* (bug 18190) Proper parsing in MediaWiki:Sharedupload message
* (bug 17617) HTML cleanup for ImagePage
* (bug 17964) namespaceDupes.php no longer fails on an empty interwiki table
* Improved error handling for image moving
* (bug 17974) On Special:SpecialPages, restricted special pages are now marked 
  with <strong> tags, helps with text-based browsers
* (bug 18259) Special:DeletedContributions now also uses
  MediaWiki:Sp-contributions-logs for the link to Special:Log
* Don't add empty title="" attributes to links to anchors on the current page
* (bug 18291) rebuildrecentchanges.php failed to add deletion log entries
* (bug 18304) rebuildrecentchanges.php got size changes wrong
* (bug 18170) Fixed a PHP warning in Parser::preSaveTransform() in PHP 5.3
* (bug 18289) Database connection error page now returns correct HTML
* "successbox", "errorbox" and related CSS classes are now available in all
  skins
* Fixed a PHP notice when $wgEnableSerializedMessages was set to false
* (bug 18316) Removed superfluous name="fulltext" from Special:Search
* (bug 18331) MediaWiki:Undelete-revision can now have wikitext
* The "noautoblock" flag is no longer displayed in the block log when blocking
  an IP address
* (bug 18009) $wgHooks and $wgExtensionFunctions now support closures
* (bug 17948) Maintenance scripts now exit(0) or exit(1) as appropriate
* (bug 18377) Time in Enhanced ChangesList lacking localisation
* (bug 12998) Allow <sup>, <sub>, etc. in DISPLAYTITLE
* (bug 1553) Lowercase navigation headings in German
* (bug 7830) Pending transactions failed to commit on loginToUse() error
* (bug 11613) session.save_handler being over-ridden
* (bug 11381) session.save_handler being set twice (causes error)
* (bug 17835) ForeignAPIRepo throwing error on first page load for file
* (bug 18115) ForeignAPIRepo cache isn't working
* Fixed a bug caused by LanguageConverter.php, which brings an abnormal '}-'
  after some parsed math syntax.
* (bug 18441) rebuildrecentchanges.inc no longer ignores $wgLogRestrictions
* (bug 18317) Bolded selections in 1 | 3 | etc days on RecentChanges now use
  <strong> instead of hardcoded styles
* (bug 18449) Fixed items number per column on category pages when the total is
  divisible by 3
* (bug 18121) maintenance/deleteArchivedRevisions.php no longer deletes
  revisions when --delete is not passed
* (bug 13172) GPS coordinates in image Exif data are now actually displayed
* Overhaul of preferences system, includes the following bug fixes:
* (bug 5363) Changes to default preferences now impact registered users.
* (bug 14806) Hook to enable putting preferences in existing tabs.
* (bug 17191) Registration date now listed on preferences page.
* Note that this change will break some extensions which have not been adapted
  for it.
* (bug 17020) Adding fallback encodings for Traditional and Simplified Chinese 
  languages while the the text is typed as URLs.

== API changes in 1.15 ==
* (bug 16858) Revamped list=deletedrevs to make listing deleted contributions
  and listing all deleted pages possible
* (bug 16844) Added clcategories parameter to prop=categories
* (bug 17025) Add "fileextension" parameter to meta=siteinfo&siprop=
* (bug 17048) Show the 'new' flag in list=usercontribs for the revision that
  created the page, even if it's not the top revision
* (bug 17069) Added ucshow=patrolled|!patrolled to list=usercontribs
* action=delete respects $wgDeleteRevisionsLimit and the bigdelete user right
* (bug 15949) Add undo functionality to action=edit
* (bug 16483) Kill filesort in ApiQueryBacklinks caused by missing parentheses.
  Building query properly now using makeList()
* (bug 17182) Fix pretty printer so URLs with parentheses in them are
  autolinked correctly
* (bug 17224) Added siprop=rightsinfo to meta=siteinfo
* (bug 17239) Added prop=displaytitle to action=parse
* (bug 17317) Added watch parameter to action=protect
* (bug 17007) Added export and exportnowrap parameters to action=query
* (bug 17326) BREAKING CHANGE: Changed output format for iiprop=metadata
* (bug 17355) Added auwitheditsonly parameter to list=allusers
* (bug 17007) Added action=import
* BREAKING CHANGE: Removed rctitles parameter from list=recentchanges because
  of performance concerns
* Listing (semi-)deleted revisions and log entries as well in prop=revisions
  and list=logevents
* (bug 11430) BREAKING CHANGE: Modules may return fewer results than the
  limit and still set a query-continue in some cases
* (bug 17357) Added movesubpages parameter to action=move
* (bug 17433) Added bot flag to list=watchlist&wlprop=flags output
* (bug 16740) Added list=protectedtitles
* Added mainmodule and pagesetmodule parameters to action=paraminfo
* (bug 17502) meta=siteinfo&siprop=namespacealiases no longer lists namespace
  aliases already listed in siprop=namespaces
* (bug 17529) rvend ignored when rvstartid is specified
* (bug 17626) Added uiprop=email to list=userinfo
* (bug 13209) Added rvdiffto parameter to prop=revisions
* Manual language conversion improve: Now we can include both ";" and ":" in
  conversion rules
* (bug 17795) Don't report views count on meta=siteinfo if $wgDisableCounters 
  is set
* (bug 17774) Don't hide read-restricted modules like action=query from users
  without read rights, but throw an error when they try to use them.
* Don't hide write modules when $wgEnableWriteAPI is false, but throw an error
  when someone tries to use them
* BREAKING CHANGE: action=purge requires write rights and, for anonymous users,
  a POST request
* (bug 15935) Added action=userrights to add/remove users to/from groups
* (bug 18099) Using appendtext to edit a non-existent page causes an interface
  message to be included in the page text
* Added uiprop=changeablegroups to meta=userinfo
* Added usprop=gender to list=users
* (bug 18311) action=purge now works for images too
* Add parentid to prop=revisions output
* (bug 17832) action=delete returns 'unknownerror' instead of 'permissiondenied'
  when the user is blocked
* (bug 18546) Added timestamp of new revision to action=edit output
* (bug 18554) Also list hidden revisions in list=usercontribs for privileged
  users
* (bug 13049) "API must be accessed from the primary script entry point" error 

=== Languages updated in 1.15 ===

MediaWiki supports over 300 languages. Many localisations are updated
regularly. Below only new and removed languages are listed, as well as
changes to languages because of MediaZilla reports.

* Austrian German (de-at) (new)
* Swiss Standard German (de-ch) (new)
* Simplified Gan Chinese (gan-hans) (new)
* Traditional Gan Chinese (gan-hant) (new)
* Literary Chinese (lzh) (new)
* Uyghur (Latin script) (ug-latn) (renamed from 'ug')
* Veps (vep) (new)
* Võro (vro) (renamed from fiu-vro)
* (bug 17151) Add magic word alias for #redirect for Vietnamese
* (bug 17288) Messages improved for default language (English)
* (bug 12937) Update native name for Afar
* (bug 16909) 'histlegend' now reuses messages instead of copying them
* Traditional/Simplified Gan Chinese conversion support
* (bug 18474) Sorani (ckb - Central Kurdish) (renamed from ku-arab)
* Add PLURAL function for Scots Gaelic (gd)

== Compatibility ==

MediaWiki 1.15 requires PHP 5 (5.2 recommended). PHP 4 is no longer supported.

PHP 5.0.x fails on 64-bit systems due to serious bugs with array processing:
http://bugs.php.net/bug.php?id=34879
Upgrade affected systems to PHP 5.1 or higher.

MySQL 3.23.x is no longer supported; some older hosts may need to upgrade.
At this time we still recommend 4.0, but 4.1/5.0 will work fine in most cases.


== Upgrading ==

1.15 has several database changes since 1.14, and will not work without schema
updates.

If upgrading from before 1.11, and you are using a wiki as a commons reposito-
ry, make sure that it is updated as well. Otherwise, errors may arise due to
database schema changes.

If upgrading from before 1.7, you may want to run refreshLinks.php to ensure
new database fields are filled with data.

If you are upgrading from MediaWiki 1.4.x or earlier, some major database
changes are made, and there is a slightly higher chance that things could
break. Don't forget to always back up your database before upgrading!

See the file UPGRADE for more detailed upgrade instructions.


=== Caveats ===

Some output, particularly involving user-supplied inline HTML, may not
produce 100% valid or well-formed XHTML output. Testers are welcome to
set $wgMimeType = "application/xhtml+xml"; to test for remaining problem
cases, but this is not recommended on live sites. (This must be set for
MathML to display properly in Mozilla.)

For notes on 1.14.x and older releases, see HISTORY.


=== Online documentation ===

Documentation for both end-users and site administrators is currently being
built up on MediaWiki.org, and is covered under the GNU Free Documentation
License (except for pages that explicitly state that their contents are in
the public domain) :

  http://www.mediawiki.org/wiki/Documentation


=== Mailing list ===

A MediaWiki-l mailing list has been set up distinct from the Wikipedia
wikitech-l list:

  http://lists.wikimedia.org/mailman/listinfo/mediawiki-l

A low-traffic announcements-only list is also available:

  http://lists.wikimedia.org/mailman/listinfo/mediawiki-announce

It's highly recommended that you sign up for one of these lists if you're
going to run a public MediaWiki, so you can be notified of security fixes.


=== IRC help ===

There's usually someone online in #mediawiki on irc.freenode.net