x - crash

[Jonathan L Dubois <dubois bec physics udel edu>]

I just had an interesting experience..  
I was reading something in netscape and the screen froze.  I went to
another machine and successfully logged in.  Top said X was eating 98%
cpu.  I killed xdm and X but the console didnt come back up -- still the
same frozen image from my now nonexistent X session.  After restarting xdm
everything came back up and seems to be working normally.  I've never had
anything like this happen before.  The machine is an lx164 with 
kernel 2.1.131
XFree86-libs-3.3.2.3-20
XFree86-SVGA-3.3.1-14
and an 8 mb MM II

any ideas?

Jonathan