failure of the \= regexp in buffers with non-ASCII text

This is driving me nuts. The regexp \= (match empty string at point) fails anywhere after the first non-ascii character in a buffer. I'm using XEmacs 21.4.20, Mule build, no exotic config options. To recreate, start xemacs -q, find a new file, either leave it in the default ISO8 coding system or switch it to some other, type aáa and then do M-C-s \ = at each of the four points. It will succeed at points 1 and 2, and fail at points 3 and 4. The problem also occurs in 21.5(beta28). -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. _______________________________________________ XEmacs-Beta mailing list XEmacs-Beta(a)xemacs.org http://calypso.tux.org/cgi-bin/mailman/listinfo/xemacs-beta