Ian Romanick of Intel's Open-Source Technology Center has announced the immediate release of Mesa 9.1.2 for open-source graphics drivers.
The Mesa 9.1.2 release takes care of a handful of bug-fixes over the earlier 9.1.1 release from last month. Among the bug-fixes are for i965 corrections to green artifacts when using GLSL in XBMC, R00g having black objects for Unigine Heaven 3.0, Sandy Bridge KWin GLES screen corruption, UBO corrupted rendering for Ivy Bridge, an AIGLX R600 error, and fixes for an assortment of other issues.
The brief release announcement to Mesa 9.1.2 can be read on the Mesa mailing list
or a list of the official bug-fixes can be found in HTML form from this Git commit