I now have both 21.4.13 and 21.4.18 installed on the same box, with the same load-path values. I can see that this might cause me some problems down the road, but it makes it real easy to compare the two. The key to this problem appears to be the interpreter-mode-alist value. On 21.4.13, the default value for this has lots of content, covering numerous shell script languages. On 21.4.18, this only has "emacs". -----Original Message----- From: Adrian Aichner [mailto:adrian＠xemacs.org] Sent: Tuesday, December 13, 2005 12:27 PM To: Karr, David Cc: XEmacs Beta Subject: Re: 21.4.18: How Xemacs can figure out to go into shell-script-mode? "Karr, David" <david.karr(a)wamu.net&gt; writes: Hi David, just a quick guess from my memory: Do you have sh-script/executable.el on both systems? I also have these in my site-start.el, but haven't needed to test these for years: (setq interpreter-mode-alist (cons '("^#!.*/csh\\b" . csh-sh-mode) interpreter-mode-alist)) (setq interpreter-mode-alist (cons '("^#!.*/ksh\\b" . ksh-sh-mode) interpreter-mode-alist)) (setq interpreter-mode-alist (cons '("^#!.*/sh\\b" . sh-sh-mode) interpreter-mode-alist)) Good Luck, Adrian -- Adrian Aichner mailto:adrian＠xemacs.org http://www.xemacs.org/