On Thu, 19 Nov 2009 15:59:39 -0500, Stefan Monnier <monnier@IRO.UMontreal.CA> wrote:
>> I pulled a new Emacs snapshot from the Git repository this morning and
>> noticed that typing a space in message-mode fails with a backtrace
>> similar to the one attached to this message.
>
> Sorry, and thanks for the report.  I just fixed it (you'll need to
> rm lisp/abbrev.elc to force recompiling it with the new simple.el).

Thanks!  All works fine now.