>>>>> "Markus" == Markus Alt <altmark(a)de.ibm.com&gt; writes: Markus> I also get that error Giacomo described with 21.5.12, but Markus> not with 21.4.12 where the value of w3-configuration-data Markus> is exactly the same. Markus> However, my backtrace is a bit different: Markus> Signaling: (wrong-type-argument integerp nil) Markus> w3-configuration-data(datadir) This is due to my patch which clears the match data unconditionally on preparing every search. The function `w3-configuration-data' depends on match data persisting if the search fails. I will revert the change soon, but I'm undecided as to exactly how to do that (the patch fixed a couple of bugs en passant). The following version of `w3-configuration-data' is NOT ROBUST, but will work with the XEmacs package distribution of w3.el. (defun w3-configuration-data (option &optional default) (warn "Crocked version of `w3-configuration-data' was used!") (let ((info (or (cdr-safe (assq option w3-configuration-data)) default))) (if (not (stringp info)) (setq info (eval info))) (while (string-match "\\$[({]\\([^{(]+\\)[})]" info) (setq info (concat (substring info 0 (match-beginning 0)) ;; CROCK! KLUDGE! Oh, the shame! Don't look! (save-match-data (w3-configuration-data (intern (match-string 1 info)) "")) (substring info (match-end 0))))) info))