Hm, I could have sworn I tested it with 'emacs -q', but apparently I made a mistake. In the end, however, it boiled down to corrupted part of '.emacs' where customization variables are (this is an alignment rule): (open-comment (regexp lambda (end reverse) (funcall (if reverse (quote re-search-backward) (quote re-search-forward)) (concat "[^ \\\\]" (regexp-quote comment-start) "\\(.+\\)$") end t)) (modes . align-open-comment-modes)) The string after 'concat' looks very incorrect and when I replaced it with the proper one from current source code, comment eating is gone. Of course, I cannot guarantee I didn't modify it, but _maybe_ at some point Emacs screwed it up itself. Can you try customizing 'align-rules-list' in a harmless way and check that what is written in Elisp is actually correct? Paul On 18 December 2013 04:27, Glenn Morris wrote: > > I can't reproduce this. >