AppleInsider | Apple releases Mac OS X 10.6.2 with guest account bug fix
Apple's second update for Snow Leopard, Mac OS X 10.6.2, was officially released Monday afternoon, fixing a number of issues including a guest account bug that could potentially delete a user's account data.
via appleinsider.com
Update:
It doesn’t seem to work with the Intel Atom processor.via liliputing.com