I think imagebam may have been compromised. Every time I click on one of the images, another tab opens, locks the window controls, and says that my computer has a virus. It's clearly fake, but the ad itself is really hard to deal with. Sometimes I need to go into the task manager and close my browser. I recommend you guys use another hosting service.
I wouldn't worry about it. It's been doing that for some time, and, frankly, I think most of these image hosting sites come with pop-ups now. Just ignore the pop-up and close it immediately. Yes, it's annoying, but what are you gonna do, stop going online? :P
