Appears to be related:
At least I'd like to think there isn't more than 1 problem with the driver that produces identical symptoms.
Caveat: with Redhat 9 I reverted to NVidia driver release 3123. GLX will fail to load but at least it doesn't freeze on me. Only reason to do this is TwinView support and DVI support, otherwise I would just use the open source driver. Which leads me to believe the bug is either in NVidia's GL or GLcore... the consensus seems to be that it happens alot when mozilla does stuff with fonts.
Maybe I'll try to turn off GLX and see if the freezes go away in 4363.