I installed the updated junk filter and SP1 for Office 2003 yesterday. I have not had any problems with either update so far. Today I installed the Business Contact Manager SP1 for Outlook. I am amazed how many COM add-ins I am running in Outlook without it croaking. I am running Plaxo, Lookout, and SpamBayes in an Outlook that also supports Business Contact Manager. Whew! I need to knock on wood.