* Added ApiQueryORM class to facilitate creation of query API modules based on
tables that have a corresponding ORMTable class.
* (bug 40876) Icon for PSD (Adobe Photoshop) file types.
+* (bug 40641) Implemented Special:Version/Credits with a list of contributors.
+* (bug 7851) Implemented one-click AJAX patrolling.
=== Bug fixes in 1.21 ===
* (bug 40353) SpecialDoubleRedirect should support interwiki redirects.
disabled, and don't wrap HTML-syntax definition lists in paragraphs.
* (bug 41409) Diffs while editing an old revision should again diff against the
current revision.
+* (bug 41494) Honor $wgLogExceptionBacktrace when logging non-API exceptions
+ caught during API execution.
+* (bug 37963) Fixed loading process for user options
+* (bug 26995) Update filename field on Upload page after having sanitized it.
+* (bug 41793) Contribution links to users with 0 edits on Special:ListUsers didn't
+ show up red.
+* (bug 41899) A PHP notice no longer occurs when using the "rvcontinue" API parameter.
+* (bug 42036) Account creation emails now contain canonical (not
+ protocol-relative) URLs.
+* (bug 41990) Fix regression: API edit with redirect=true and lacking
+ starttimestamp and basetimestamp should not cause an edit conflict.
+* (bug 41706) EditPage: Preloaded page should be converted if possible and needed.
+* (bug 41886) Rowspans are no longer exploded by tablesorter until the table is
+ actually sorted.
+* (bug 2865) User interface HTML elements don't use lang attribute
+ (completed the fix by adding the lang attribute to firstHeading)
=== API changes in 1.21 ===
* prop=revisions can now report the contentmodel and contentformat, see docs/contenthandler.txt
page content; See docs/contenthandler.txt for details.
* (bug 35693) ApiQueryImageInfo now suppresses errors when unserializing metadata.
* (bug 40111) Disable minor edit for page/section creation by API
+* (bug 41042) Revert change to action=parse&page=... behavior when the page does not exist.
=== Languages updated in 1.21 ===