I'm not very experienced in Linux, so some crucial information may be missing from this report. I will answer further questions if needed. I have a Logitech MX510 mouse. I also use Fedora 7 and have updated XEmacs to the latest version using "yum update xemacs". Version is 21.5 (beta28). There seems to be something really wrong with the thumb buttons, which are buttons 8 and 9 by default. Using this init: (global-set-key 'button8 'copy-primary-selection) (global-set-key 'button9 'yank-clipboard-selection) XEmacs just says "button8 undefined" and "button9 undefined". Nevertheless if I map those buttons to button6 and 7 using .Xmodmap and change the init to (global-set-key 'button6 'copy-primary-selection) (global-set-key 'button7 'yank-clipboard-selection) , it works. In GNU Emacs I don't have to map anything, buttons 8 and 9 work just fine. But it gets even stranger: If I in XEmacs interactivly bind button8 using ALT-x global-set-key, press the button which it recognizes as button8 and type global-set-key, it works. But only until I do the same with button9. Then BOTH buttons stop working. I have 32bit Fedora 7 on 32bit CPU. _______________________________________________ XEmacs-Beta mailing list XEmacs-Beta(a)xemacs.org http://calypso.tux.org/cgi-bin/mailman/listinfo/xemacs-beta