Comment 28 for bug 322256

I sure hope this is the active bug for this.

I think I have a little insight into this bug. My symptom is that a newgroup
will default to some number (say 9). If more messages actually come in, the
reported number of unread messages in the sidebar will be 9 plus the number of
new messages. I was given a "fix" for the bug, which was deleting the file
specific to the newsgroup and restarting Moz. It almost worked. Now, the
newsgroup title is just bold normally. When I select it, it now displays a 1
in parenthesis, even though there are no new messages.
Also, it seems that it is directly related to the number of posts I've made on
that newsgroup.
I only get this bug for newsgroups that I've posted on (I read a lot, and post
little).
I've been reading a lot of posts for this bug, but I've never heard it mentioned
that this bug interferes with the "next" button. It won't move past the thread
with the false positive in it.