>> emacs -Q --eval '(progn (define-derived-mode test-mode fundamental-mode
>> "TEST" (message "Test mode called")) (add-to-list (quote auto-mode-alist)
>> (quote ("\\.test$" test-mode t))))' file.html.test file.test
>> 
>> Buffer visiting file.html.test is in mhtml-mode, buffer visiting file.test
>> is in fundamental mode, no message is emitted. 

Yup.

The patch below seems to do the trick.  Any comment/objection?


        Stefan