Mozilla and Seg Fault?

I recently took the painful time to download Mozilla 0.9.7 onto my Linux machine which previously had had an earlier version on using an "Update Agent" provided by the distro (in this case Red Hat). After loading and updating the packages (which went fine apparently), the mozilla links and event he executable from both command line and icons just falls flat! The error is: Segmentation Fault When running: /usr/bin/mozilla or: mozilla Any ideas as to what may be the problem? I've tried rebuilding the RPM database etc, and that hasn't worked. Would it be worth reloading Mozilla or is this a permanent fixture now? Thanks in advance! Paul