Interesting. Yes, I did mean the tutorial you had setting up a virtual user mail system on Sarge.
I am not sure I really need to upgrade to Spamassassin 3.1.0. Currently 3.03 is working fine with amavis-new. Just curious whether you had yet considered it yourself and if so, then why (what is incrementally better in SA 3.1.0 versus 3.0.3).