This kernel is the same as the git hash 33456102 but has commit 4fdaa507 cherry-picked in to provide the fix for hangs on startup/reboot. 

The squeeze-desktop image came with a build of a more recent kernel but it has problems with video playback on certain HDMI monitors. you might want to install this one instead. 

If you have one of the headless images you still want this kernel because of the startup/reboot hang fix.