(In reply to comment #41)
> Are you sure the problem is in the .rc file?
[...]
I am (or at least that's where "part" of the problem lies): messages canceled before having been read cannot be "marked as read" in the rc file other than by hand-editing, and they are counted as "unread" in the newsgroup in the left pane; see bug 294754 comment #3.
(In reply to comment #41)
> Are you sure the problem is in the .rc file?
[...]
I am (or at least that's where "part" of the problem lies): messages canceled before having been read cannot be "marked as read" in the rc file other than by hand-editing, and they are counted as "unread" in the newsgroup in the left pane; see bug 294754 comment #3.