The version of eieio currently distributed as an XEmacs package has a small bug. The function eieio-help-mode-augmentation-maybee takes no arguments. It is placed on temp-buffer-show-hook. When that hook is processed by dframe-temp-buffer-show-function, it sees that XEmacs is in use, and uses run-hook-with-args to send the buffer as the argument to the function, resulting in an error. This manifests itself if you do C-h k mouse-2 over a speedbar frame. The fix is to make eieio-help-mode-augmentation-maybee take an optional ignored argument: (defun eieio-help-mode-augmentation-maybee (&optional ignored) ... Regards, -- Jerry James http://www.ittc.ku.edu/~james/