> Occasionally I'll see a collapsed group that indicates by
> the font or color that there's an unread message in it somewhere,
but
> when I expand the thread there are no unread messages to be found.
But
> if I close it again it still shows that there should be something
> unread inside.
This could be the result of ignored or low scored articles not being
marked
read, but not being displayed either, if you have it set that way.
This type
of issue is one of the reasons I've never found much use for such
things -- I
don't like having "unread" articles that I can't see. (Since I don't
use
that set of features, I can't say for sure that's the problem, but
the symtoms and frustration are familiar from when I tried the idea
last time.
It simply didn't work with the way I work. <g>)