bug#9831: cause of bug found! [PATCH]

[martin rudalics]

>     Yes, 'o' calls rmail-output from an Rmail buffer and
> rmail-summary-output from the associated summary buffer.  Both suffer
> from the bug we are talking about.

Aha.

>     What John means by "changes to that buffer" is that his window
> showing rmail-buffer A changes to a *different* rmail-buffer, namely the
> one he was outputting the message to.  Note that this buffer change does
> not occur when the targeted rmail file is not held in a buffer, hence
> John's comments about inconsistency.

OK.  I believe you now.

>     Let's ask John if my patch makes his bug go away.  It certainly
> makes mine go way.

Good idea.

Thanks, martin