XEmacs 21.1.9 breaks Gnus v5.8 (get-charset-property)

When trying to send mail from XEmacs 21.1.9 and Gnus v5.8.x (latest CVS), I get the following error and backtrace: Signaling: (void-function get-charset-property) get-charset-property(ascii prefered-coding-system) mm-preferred-coding-system(ascii) mm-mime-charset(ascii) mapcar(mm-mime-charset (ascii)) rfc2047-encodable-p() mail-encode-encoded-word-buffer() message-send-mail(nil) message-send-via-mail(nil) message-send(nil) message-send-and-exit(nil) call-interactively(message-send-and-exit) It looks like Andreas Jaeger reported this problem to xemacs-beta back in early December, but nothing was done about it. See: <URL:http://www.xemacs.org/list-archives/xemacs-beta/199912/msg00123.html>