Interesting

The very first report I submitted (
http://comments.gmane.org/gmane.emacs.orgmode/53824 ) showed the historic
behavior correct (the two tags defined in org-tag-alist show up in the fast
tag completion window). The "bug" was after shifting to free tag selection
mode, the tags defined in org-tag-alist are not available for completion.

The behavior that Matt Lundin reported was/is a side effect of the fix
(implementation). I think that the idea of the fix is valid, e.g. the free
tag entry should autocomplete tags defined in org-tag-alist to match the
behavior of the fast tag completion window.

On Tuesday, April 10, 2012, Bastien wrote:

> Hi Mike,
>
> I just reverted the commits I pushed for fixing this "issue".
>
> Mike McLean <mike.mclean@pobox.com <javascript:;>> writes:
>
> > The expected result is a completion list of tag_a and tag_b, this
> > does not work and the Minibuffer prompts [No match]
>
> I cannot do any better than to quote Matt Lundin on this:
>
> "Historically, only tags explicitly defined in org-tag-alist or via an
> in-buffer heading show up in the fast tag completion window."
>
> So, let's stick to the current behavior.
>
> Thanks for your patience!
>
> --
>  Bastien
>