Hello!

I'm running emacs 21.2 and have set:

ediff-diff-options's value is
"--ignore-space-change --ignore-blank-lines"

and when I run ediff-buffers, it says:

ediff-setup-diff-regions: Option `-c' is not allowed in
`ediff-diff-options'

The attached patch fixes the problem: it refines the regexp for the
check. I had a look into the CVS of Emacs, it looks like this is not
yet fixed in the HEAD either.

Regards,


-- 
Ivan Zakharyaschev
ALT Linux Team member
I'm a Sisyphus developer: it's core is GNU/Linux
http://www.altlinux.ru, http://www.altlinux.com