With a few of my widgets, examples are the bubbles guessing game and the halloween trick or treating widget the only thing I am seeing are black windows. When I visit other moms pages if they have the same widgets it appears they aren't loading either.
I'm thinking it's a problem with your computer because I have had no problem viewing those widgets on people's pages. I recommend cleaning your cache and cookies. If that doesn't work you should as the Team using the "Contact Us" link at the bottom of your screen. Doing this will give them technical information about your browser so they can help you better. Good luck to you. =)