title: why does my FB.ui dialog request cause a pop-up blocker?
body: <p><a href="https://developers.facebook.com/blog/post/453" rel="nofollow">In this simple example</a>,
  when the code runs I don't get a nice "lightbox" dialog, I get a pop-up blocker warning in both IE and chrome.  But I've seen sites that get it to work as a lightbox.  Any idea why?</p>