SL Baur <steve(a)xemacs.org> writes in xemacs-beta(a)xemacs.org:
Does this only happen with a Solaris X server? How about if you
rebytecompile x-win-sun.el and redump XEmacs?
Adrian, try this instead. Start xemacs -vanilla, then load
x-win-sun.el and then load dired. Does this beep? Hopefully this
will give a more detailed backtrace.