I do use the Google toolbar popup blocker. Perhaps I should turn it off for a while and see what happens. I’m hesitant to do this, though, because it claims to have blocked 5,423 popups since I installed it 6 months ago. That equates to roughly 30 popups each day. Yikes!
But thanks for the tip — I will give this a try and see how bad it really is with the popup blocker turned off.