MyWhimsy,
Since you mentioned you were using a pop-up blocker, I'm guessing you may have other security features enabled on your computer as well?
My best guess is that some of the java-script on our pages is being flagged by whatever software you are using and thus the page is prevented from being displayed. Not sure if you can check for something like this and "allow" our pages to display?
Was this happening all along, or did this just start happening? Or maybe you're using a different computer than you originally were?
-Kevin