It doesn’t work for me!
Half the box in Text & RSS widgets seems to disappear behind the lines on the left of the screen. It isn’t even possible to see or click the ‘change’ or ‘remove’ buttons.
You can see the rest of the box if you click on the whole thing to move it, but it disappears as soon as it’s static in the Sidebar list.
I expect you are using IE. It has a problem with the widgets area right now. My suggestion is to download Firefox and use it till they hack things to work with IE. Once the get the hacks in place, then you can uninstall Firefox and go back to IE if you wish.