I just tried stumbleupon as well. I tried it first in windows and did have a few popups, but not nearly as many as you mention. I signed up for mostly computer categories mind you, and for advertising/business pages I imagine the likelihood of having a popup on it would be greater.
Now I've switched to using Stumbleupon for mozilla and its much, much better. I've found lots of cool sites but haven't had a single popup... I suggest you switch as well.
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I just tried stumbleupon as well. I tried it first in windows and did have a few popups, but not nearly as many as you mention. I signed up for mostly computer categories mind you, and for advertising/business pages I imagine the likelihood of having a popup on it would be greater.
Now I've switched to using Stumbleupon for mozilla and its much, much better. I've found lots of cool sites but haven't had a single popup... I suggest you switch as well.