When I boot a VMWare image of openSUSE 11.0 (beta), X crashes repeatedly, and GDM shows an error dialog in text mode. I've managed to produce a stack trace from x.org, using gdb in a remote login thusly:

[In remote console]

init 3
while true; do sleep 1; XPID=$(pidof X); if [ "$XPID" != "" ]; then gdb X $XPID; fi; done

[In main console]

init 5

GDM starts up, starts X. gdb attaches to and suspends X, and I tell it to continue execution. I then get a crash, the stack trace for which I'll attach.

X.org is latest git version.