xf86-video-intel-2.6* breaks things for users of KDE 4 and G965 chipsets. The problem is fixed upstream in master and 2.7 branch: http://bugs.freedesktop.org/show_bug.cgi?id=20527
The patch being already committed to the 2.7 branch, I think it's best to wait for the next 2.7 RC instead. Thanks
2.7.0 is in portage (although with a temporary p.mask). Closing fixed. Thanks