Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Clicking on the "comment" or "stats" link on a community ad brings up a dialog like this:
On pressing OK, the page is loaded as normal. This is in Chrome 12.
This will be fixed in the next deployment - cause: being trapped inside of an iframe when displayed from within adzerk.