I just saw one again when I brought up this post. Didn't catch what it was for...
When I posted my comment, a new pop-up came up. It was for Vonage.
Confirmed. I got the Vonage ad too. Google doesn't do pop-ups. I'd check the stats stuff.
Thanks for all the feedback. I've removed the StatCounter scripts, hopefully that should be ok. If You still get more popups, please let me know, and I'll know for sure it's the NedStat counter, and will publicly flog them for this ugly tactic.
Works okay for me now. No popups. Thanks!
Yeah, trust me, Google ads never cause popups. StatCounter sounds much more likely.