Launched on Jan 4th, 2013.
This release solves the following issues:
Update the source to the new jQuery version 1.9. This version has several deprecated features such as
$.browser that have been removed.
SP2010 hosted - files were not opening when clicking the icon next to the filename
SP 2010 - Calendar add icon misplaced
SP2010 - Fixed position of the Ribbon bar
Ribbon icons not displaying in IE7
Layouts HTML was being delivered in a single line