* (bug 41889) Fix $.tablesorter rowspan exploding for complex cases.
* (bug 47489) Installer now automatically selects the next-best database type if
the PHP mysql extension is not loaded, preventing fatal errors in some cases.
+* (bug 47202) wikibits: FF2Fixes.css should not be loaded in Firefox 20.
=== API changes in 1.21 ===
* prop=revisions can now report the contentmodel and contentformat.