There are a lot of OpenGL issues and more related at least to intel drivers which are solved now - see URL and http://lists.x.org/archives/xorg-devel/2011-March/020716.html .
Probably this patch is worth to be added to the ebuild too.
We are not backporting any patches that are not in the main cvs repository and the respective branch.
At the point it gets into the branch it can be added to latest xorg-server version as patch.
(obviously bugzilla now doubleposts :))