On Wed, 09 Nov 2011 08:46:02 +0000, Jani Nikula <jani@nikula.org> wrote:
> It's unrelated, but looking at the above also made me check something
> I've suspected before: notmuch allows you to have empty or zero length
> tags "", which is probably not intentional.

I had reported already that it is possible to add either an empty or a
"\n" tag (not sure what gets added) via '+<RET>' in the emacs UI. See
the newline in the tag list. Remove it again with '-<RET>' in emacs.

Sebastian