Mail groups with no unread messages in topics with no unread messages
(thus hidden) are shown at random positions in the Group Buffer after
copying a message from within another group to them after exiting the
group copied from.
Cheers, Ray'always wanted to write a single sentence bug report'mond
--
"The obvious mathematical breakthrough would be development of an easy way
to factor large prime numbers." (Bill Gates from The Road Ahead, p265)