2.6.31 kernel from kernel.org
[ebuild R ] x11-libs/libdrm-2.4.13
[ebuild R ] media-libs/mesa-7.5.1
[ebuild R ] x11-base/xorg-server-184.108.40.2061-r1
[ebuild R ] x11-drivers/xf86-video-intel-2.8.1
after suspend to ram, after using "Present Windows - All Desktops" effect for several time on a desktop with one open window
in the "Present Windows - Current Desktop" effect, hovering mouse over individual windows doesn't select individual windows.
However, it worked with kde 4.2.4
Post `emerge --info` at least.
Honestly, all I know is that suspend/hibernation are still not complete, as even just last week very low-level hardware bugs were fixed. So it doesn't surprise me that higher-level operations such as compositing are still flaky.
The best I can do here is to point you to FreeDesktop's bugzilla  where you can file bugs and hopefully, Intel devs will be able to help. Please paste the url here so we can track the issue upstream.