Hi Mike, I like the new #c (ignore case) feature of ediff a lot! It works just like I wanted. It has some difficulty, however, with my setting of ediff-diff-options "--binary --strip-trailing-cr" which it moans about in the following way: Options `-c' and `-i' are not allowed in `ediff-diff-options' Here is my suggested medical treatment (one application should suffice): 2006-02-20 Adrian Aichner <adrian(a)xemacs.org&gt; * ediff-diff.el (ediff-setup-diff-regions): Avoid false positives of forbidden options by adding leading context of space or begin of string. --- c:\Program Files\XEmacs\xemacs-packages\lisp\ediff\ediff-diff.el~ 2006-02-20 20:44:35.000000000 +0100 +++ c:\Program Files\XEmacs\xemacs-packages\lisp\ediff\ediff-diff.el 2006-02-20 21:29:09.765625000 +0100 ＠＠ -251,7 +251,7 ＠＠ ;; ediff-setup-diff-regions3, which takes 4 arguments. (defun ediff-setup-diff-regions (file-A file-B file-C) ;; looking for '-c', '-i', or a 'c', 'i' among clustered non-long options - (if (string-match "^-[ci]\\| -[ci]\\|-[^- ]+[ci]" ediff-diff-options) + (if (string-match "^-[ci]\\| -[ci]\\|\\(^\\| \\)-[^- ]+[ci]" ediff-diff-options) (error "Options `-c' and `-i' are not allowed in `ediff-diff-options'")) ;; create, if it doesn't exist Best regards, Adrian Emacs: XEmacs 21.5 (beta24) "dandelion" (+CVS-20051218) [Lucid] (i586-pc-win32, Mule) of Mon Dec 19 2005 on TANG Package: Ediff 2.81 of February 18, 2006 current state: ============== (setq ediff-diff-program "diff" ediff-diff-options "--binary --strip-trailing-cr" ediff-diff3-program "diff3" ediff-diff3-options "" ediff-shell "cmd.exe" ediff-use-faces t ediff-auto-refine 'on ediff-highlighting-style 'face ediff-buffer-A #<buffer "ediff-diff.el~"> ediff-buffer-B #<buffer "ediff-diff.el"> ediff-control-buffer #<buffer "*Ediff Control Panel<13>*"> ediff-forward-word-function 'ediff-forward-word ediff-control-frame nil ediff-control-frame-parameters '((name . "Ediff") (minibuffer) (user-position . t) (vertical-scroll-bars) (scrollbar-width . 0) (scrollbar-height . 0) (menu-bar-lines . 0) (tool-bar-lines . 0) (auto-lower) (auto-raise . t) (visibility) (width . 1) (height . 1) (top . 1051) (left . 1401)) ediff-control-frame-position-function 'ediff-make-frame-position ediff-prefer-iconified-control-frame nil ediff-window-setup-function 'ediff-setup-windows-plain ediff-split-window-function 'split-window-vertically ediff-job-name 'ediff-files ediff-word-mode nil buffer-name "*Ediff Control Panel<13>*" ediff-device-type 'mswindows ) -- Adrian Aichner mailto:adrian＠xemacs.org http://www.xemacs.org/