You know, it lasted about 15 or 20 minutes and then just stopped on its own. Thank goodness! It was the kind that gives a countdown (I think it was 12 seconds) but had the option of skipping it. But I would have to scroll up to the top to get to that option and find the stupid "close" thing to click on.
Grrr...
Yikes! I am not getting that but have had some really funky screens lately with all their changes. Try rebooting your computer to make sure it's not a problem with it. If it keeps up let us know and we'll report it.