This is a very plain fc3 system, no KDE or Gnome, just xdm and xfce. When I try to run mozilla or firefox they both sigsegv. Running in gdb tells me that firefox dies at JS_dtostr and mozilla dies at PR_dtoa They seem to be the same symptom. Any ideas? I tried as root also just in case it was a permissions problem. Am I missing some library or something like that? Richard