2 problems with X

[biznatch at sctelcom.net]

I'm having 2 problems with X in FC2T2.

Problem #1
Sometimes when I walk away from the computer I come back and X has crashed
and returned me to the command line. It only does it when I am logged in.
It can sit at the GDM screen for ever without problems. I wonder if it's a
problem certain with Xscreensavers.


Problem #2
Every few inches on my screen are showing distorted horizontal pixels
(slightly off center to one direction).

Are these known issues? Please advise. Thanks.