special-display-regexps and default help setup interact badly

The following is for XEmacs 21.4.10 (the current Debian package) and recent other version that I've tried... In my ~/.emacs (or equivalent), I do the following reasonable thing: (add-to-list 'special-display-regexps "\\*Help\\|\\*Apropos\\|\\*vc") This stops certain help (and similar) buffers from cluttering up my world. Under GNU Emacs (20.x, 21.x) I can kill the displayed buffer and the new frame goes away. Pop-up help - wild! :-) Under XEmacs this results in: (error "display-buffer switched frames on its own!!") Now, display buffer will do that if you tell it to! :-) The pieces of the problem are: * help.el/with-displaying-help-buffer uses temp-buffer-show-function. * temp-buffer-show-function is set to show-temp-buffer-in-current-frame, by default. * frame.el/show-temp-buffer-in-current-frame, as the name suggests, really wants the stuff displayed in the current frame and signals an error if this isn't the case. Commenting out the sanity check makes the error go away, but killing the buffer doesn't make the new frame go away. I do a similar thing for "*shell*" buffers and it works better. I guess that since "*shell*" buffers don't use a temporary buffer I don't see the error. However, killing the buffer doesn't make the frame go away... Any ideas? I guess "don't do that" is one idea, but I like doing it...:-) peace & happiness, martin