I had SpamSieve configured under 10.4 to put all spam into Apple Mail’s Junk folder and not into a separate spam folder. This worked like a treat (you helped in configuring back then) and all spam was colored properly.
With 10.5 I suddenly found that Apple’s junk filter took over and that SpamSieve somehow did only kick in after Mail’s filter had been processed. Also, spam was moved into a new spam folder that seemed to appear over night (I could swear I didn’t create it).
Is it not possible anymore to use Mail’s internal junk folder under 10.5? I just like the icon and know where to look when going through suspected spam.
Oh, wish you a happy new year too and continued success with your apps!