[Users] A filtering annoyance

[Renaud OLGIATI (Ron)]

I have a number of filter rules to sort out the incoming mail in various specialized folders (Linux, IPCop, Railways, etc) and they mostly work well; yet in recent weeks I have noticed that there are often messages that should be filtered, and that remain in the Inbox.

If I then select all the unread messages in the inbox, and go to Tools => Filter selected messages they get sorted in the corresponding folders.
 
Where should I look ?

Cheers,
 
Ron.
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                         One must improvise as well.
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