See http://list-archive.xemacs.org/xemacs-beta for incoming bugs.
Feature your favorite bugs here and point to the xemacs-beta archive for more information.
If you have a recent verson of XEmacs running on Windows then you may have the following problem:
Whenever you start XEmacs you get a coresponding console window with the messages.
Loading xlib-math...
Loading xlib-math...done
Loading xwem-compat...
Loading xwem-compat...doneThis is caused by bugs in the xwem and xlib packages. These are X Window’s specific packages so it is safe to uninstall them. (either through the XEmacs package manager or through the netinstall setup.exe installer). See the following threads for more details.