I got the same problem too.
Before that, I was using DA 1.403. All were working fine.
After I updated DA 1.43, it started not filing the already marked spam mail to SPAM folder.
What I see is the SA spam log was added to the header of that spam mail (e.g. "X-Spam-Status: Yes, score=21.4 required=7.0"). However, it was not move that mail to INBOX.spam/new folder.
Would you please suggest what I can check and follow to make it work again?
Thank you.
Tim LEUNG