Susan Bradley AKA the SBS diva is a SBS 2003 Legend!
Following normal Microsoft practice of patching what aint broke and then wondering why it is broke, I installed the Best Practices Analyser last week on my SBS2003 server. Previously it had been running absolutely perfectly. (well as perfectly as a Microsoft server can get - only needed restarting every 2 weeks or so)
The BPA told me my system was largely ok but I should fix some things. With the assistance of Susan I duly fixed these things.