Sorry about the silence; I've recently upgraded to Fedora 
 Core 3, and haven't seen any crashes or weird behaviour yet 
 (*knocks wood*).  I'll keep an eye on things, and will get 
 back to you if I manage to reproduce the problems and upgrade 
 my gdb skills to produce what you requested above. 
Ok.  Also take a look at the new xemacs-faq recently checked in; I added a
whole lot of info on debugging.