Originally Posted by AaronP
All of the reports of this problem seem to be with xserver 126.96.36.199, so my guess is that some change in that particular server version broke something. Also, I've seen reports of BackingStore causing crashes due to missing GC validation in the server somewhere. For those that have BackingStore enabled, does disabling it fix the problem? Also, please try the nv or vesa drivers to see if they have a similar problem.
Half-off-topic (using your quote: that's why I am posting here): Will you fix those BackingStore crashes with XServer 1.5 (released) in a next 173.xx.xx driver release? Will those fixes come only for 177 series? I'm stuck here with a FX 5500, and BackingStore is all I need by now.