XF2.2 has it's own heading BB-codes, so the ones included with XenCarta have been removed and replaced automatically in your page contents with the official BB-codes.
Some styling changes for headings have been updated to prevent clearing.
Added some additional search constraints. You can now search ONLY the wiki using the standard search form. You can also search the wiki using the advanced search form based on recent update times.
A new page specific option has been added to show/hide that page's attachment gallery.
A page's attachment gallery has been moved from below the page, to it's own tab.
You can now define a limit to the "Auto-link Pages" function. Previously, the system would auto-link only the first instance of a page's name. Now, you can have it link multiple instances.
The auto-link pages function has been changed a bit to better detect page names with longer names, which share words with other page names.
For some reason, in some versions of PCRE, you can't start a character class with \w. Seems like a bug with PHP, since you can start character classes with other shorthand classes such as \d without issue. Either way, this update works around this issue which caused invalid character class range errors.