"Train as good" does not longer send the spam mail back to the inbox

I don’t know exactly when it started, but recently when I want to train a received mail as “good”, it does not longer put it back to the inbox. It still does label it as unread (what I want), but it does not move it. Also, I have the impression that the unread-labelling now takes much longer than it used to, can be something like 2 seconds for a single mail now.

Is there anything I can do about this? Maybe re-install the whole SpamSieve application? I do not want to lose the training corpus, though, if at all possible…

Please see this thread.

This is fixed in SpamSieve 2.9.6.