Dired 7.10 bug: save-buffer fails if file exists

Hi, after opening a dired buffer in my (beta, mule-enabled) XEmacs, I regularly (not always, though - the problem isn't really reproducible) get a "No file on this line" error when trying to save some other file. Following a suggestion from xemacs-beta, I set debug-on-error and got the attached backtrace. Why is dired interfering with the file save, and how do I stop it? Buffer from dired-report-bug follows: Emacs: XEmacs 21.5 (beta15) "celery" (+CVS-20030905) [Lucid] (i686-pc-linux, Mule) of Tue Sep 16 2003 on linux Package: Dired current state: ============== (setq dired-version "7.10" dired-backup-if-overwrite nil dired-chown-program "chown" dired-cleanup-alist '(("tex" ".toc" ".log" ".aux" ".dvi") ("latex" ".toc" ".log" ".aux" ".idx" ".lof" ".lot" ".glo" ".dvi") ("bibtex" ".blg" ".bbl") ("texinfo" ".cp" ".cps" ".fn" ".fns" ".ky" ".kys" ".pg" ".pgs" ".tp" ".tps" ".vr" ".vrs") ("patch" ".rej" ".orig") ("backups" "~") ("completion-ignored-extensions" "CVS/" ".o" ".obj" ".elc" "~" ".bin" ".lbin" ".dvi" ".class") ) dired-compression-method 'gzip dired-compression-method-alist '((gzip ".gz" ("gzip") ("gzip" "-d") "-f") (compress ".Z" ("compress" "-f") ("compress" "-d") "-f") (pack ".z" ("pack" "-f") ("unpack")) (compact ".C" ("compact") ("uncompact")) (bzip2 ".bz2" ("bzip2") ("bunzip2") "-f")) dired-copy-preserve-time t dired-dwim-target nil dired-failed-marker-shell ?! dired-filename-re-ext "\\..+\\'" dired-find-subdir nil dired-gnutar-program nil dired-keep-marker-compress t dired-keep-marker-copy ?C dired-keep-marker-hardlink ?H dired-keep-marker-kill ?K dired-keep-marker-rename t dired-keep-marker-symlink ?S dired-keep-marker-uucode ?U dired-kept-versions 2 dired-listing-switches "-al" dired-local-variables-file ".dired" dired-ls-F-marks-symlinks nil dired-ls-program "ls" dired-mail-reader 'vm dired-mode-line-modified "-%s%s%s-" dired-no-confirm nil dired-omit-extensions '(".class" ".lbin" ".bin" ".elc" ".obj" ".o" "CVS/" "~" ".orig" ".rej" ".vrs" ".vr" ".tps" ".tp" ".pgs" ".pg" ".kys" ".ky" ".fns" ".fn" ".cps" ".cp" ".bbl" ".blg" ".glo" ".lot" ".lof" ".idx" ".dvi" ".aux" ".log" ".toc") dired-omit-files nil dired-omit-regexps '("\\`#" "\\`\\.") dired-refresh-automatically t dired-show-ls-switches nil dired-trivial-filenames "\\`\\.\\.?\\'\\|\\`#" dired-unshar-program nil dired-use-file-transformers t dired-verify-modtimes t reporter-version "Your version of reporter is obsolete. Please upgrade." )