Entourage was working fine until the update. After update Entourage freezes and Spam Sieve does not appear to auto launch. Tried deleting Spam Sieve and launching Entourage with the same results.
SpamSieve’s integration with Entourage hasn’t changed, and you said that the problem still occurs after deleting SpamSieve, so it doesn’t seem like SpamSieve itself is the problem. It would be helpful if you could open the Activity Monitor program and select Entourage in the list. When it hangs, choose Sample Process from the View menu. Then save the resulting data to a file and send it to me.