Lars Magne Ingebrigtsen <larsi@gnus.org> writes:

> Dale Hagglund <rdh@best.com> writes:
> > But, isn't the article number in the Xref header information?

> This is what Gnus does.  (Well -- it's what Gnus is supposed to do,
> but bugs have been known to exist here and there.)

I've been poking around a bit in nntp.el, and I see what you're
talking about, in `nntp-find-group-and-number'.  However, the code
only maps from article number to group name, not vice versa, which is
needed when you've fetched an article via message-id.

Here's a patch for 0.51 that fixes the problem, at least for me.

Basically, I pass a `prefgroups' parameter that's used to choose the
desired newsgroup when more than one is on the Newsgroups line.  Then,
if either newsgroup name or article number is unknown, I look it up
from the Xref line using the known value.

There's rather more comments than usual, but I needed them to keep it
all straight in my head . . . .

Dale.