dired diff feature ?!?

Is this a feature? Compare the output from `b' in a dired buffer with the output of a diff command in a xterm. dired diff seems to give the current time in place of the files' mod time. This is XEmacs 21.0 "Pyrenean-pre6" with contemporary packages. dired diff -------------- cut here ---->8 ---< head diff -u /usr/lib/xemacs-21.0/xemacs-packages/lisp/supercite/supercite.el~ /usr/lib/xemacs-21.0/xemacs-packages/lisp/supercite/supercite.el --- /usr/lib/xemacs-21.0/xemacs-packages/lisp/supercite/supercite.el~ Mon Oct 26 15:00:57 1998 +++ /usr/lib/xemacs-21.0/xemacs-packages/lisp/supercite/supercite.el Mon Oct 26 15:00:57 1998 ＠＠ -548,7 +548,7 ＠＠ (flavor 'GNU)) (if (or (string= (substring emacs-version 0 2) "19") - (string= (substring emacs-version 0 2) "20")) + (string= (substring emacs-version 0 1) "2")) (setq version 'v19)) (if (string-match "XEmacs" emacs-version) (setq flavor 'Lucid)) ---- 8<------- cut here ----------> tail $ diff -u /usr/lib/xemacs-21.0/xemacs-packages/lisp/supercite/supercite.el~ /usr/lib/xemacs-21.0/xemacs-packages/lisp/supercite/supercite.el -------------- cut here ---->8 ---< head --- /usr/lib/xemacs-21.0/xemacs-packages/lisp/supercite/supercite.el~ Tue Aug 11 22:33:34 1998 +++ /usr/lib/xemacs-21.0/xemacs-packages/lisp/supercite/supercite.el Mon Oct 26 00:49:14 1998 ＠＠ -548,7 +548,7 ＠＠ (flavor 'GNU)) (if (or (string= (substring emacs-version 0 2) "19") - (string= (substring emacs-version 0 2) "20")) + (string= (substring emacs-version 0 1) "2")) (setq version 'v19)) (if (string-match "XEmacs" emacs-version) (setq flavor 'Lucid)) ---- 8<------- cut here ----------> tail jam