I'm seeing a lot of X crashes on two systems where I'm using rh6.1 - both of them clean installs. Configuration 1: Cyrix 686 box, matrox millennium II card, SVGA X server. Configuration 2: Compaq deskpro, built-in S3 graphics, S3 x server. In all cases the only error message is that the server caught a SIGSEGV. no apparent correlation to a specific task, crashes appear to be sporadic and unrelated to which apps are open, length of session etc. most commonly used X environment on both machines is GNOME/Enlightenment, updating to latest versions of either or both does not cure the problem. Switching window managers does not cure the problem - I therefore conclude problem is in X rather than an environment-specific thing.
without more specifics, we don't have a real starting place on this bug, unfortunately. You may for instance have flakey hardware, or there may be any number of programs crashing the X server, or the server itself may be buggy. If you can isolate the problem, please reopen the bug with more details.