On Leopard, I use Mail.app. I have filters set up. They work. Except for this new one I made. It works when I choose Apply Filters manually. But does not seem to filter incoming messages.
It is my only filter that operates on something in the IMAP Gmail Spam folder. I think that mail just sees this as any other IMAP folder, so I don't know why it won't work. But do you think that Mail.App does realize that this IMAP/spam folder is actually a spam/junk folder and for some reason because of this it prevents my filter from being run?
As I said all my other filters work fine.