CMS Widget Manager erased?
 

http://i37.tinypic.com/23rk6mx.jpg

So, I was managing my widgets. Specifically, I was creating a new posts widget. I had already just created three. I was doing the same thing with the fourth one, and when I entered it, the entire Widget Manager went blank.

Then, my CMS was all white. I removed the widget I had just made from the layout, and the cms works again. The other widgets are on the CMS but they are not appearing on the Widget Manager, which was wiped.

Any idea what I can do about this?