* xemacs version: xemacs 21.4.5, gtk widgets * steps to reproduce, and description: try this, when you're ok with your xemacs possibly segfaulting: (popup-menu (vector "test" #'ignore t) when evaluating that form, my xemacs segfaults. it works fine if it's like this: (popup-menu (list "menu header not shown in GTK xemacs" (vector "test" #'ignore t))) this xemacs just doesn't seem to like a vector as the first arg on popup-menu * suggested fix: somewhere in the popup-menu defun: (check-argument-type #'listp menu-description) ..or whatever C equivalent -- sean champ