1) Cannot adjust the Site Advisor toolbar's position other than to the left of other toolbars
2) Site Advisor randomly turns gray and doesn't work/respond
3) Latest bug: When closing IE7 windows, there is a delay that sometimes results in a "Internet Explorer has stopped working and needs to restart" error. (When I disable S.A. in Internet Options -> Manage Add-Ons, this problem goes away...
There is another option called TrendSecure by Trend Micro - free - similar to S.A. I'm going to give it a try. I'd like to use S.A. but until the programmers actually listen to users and get their act together, I'm done with em!