Ok, fresh session (subscription link via email), and I got it again. I moved it around to see that the browser is minimized behind it and the popup won't let you at the browser until it's closed:
Of course, opening another browser window works around that. Right now I've got it sitting here and I haven't clicked on anything. I can leave my machine like this while I'm at work if someone can provide me with some way to run some logger or tracker to see what happens when I do click cancel. That is, if this will be helpful at all.
So yea, lmk if you need me to run anything while I have this up for tracking purposes. If no response by tonight, I'm taking my browser back.