When I upgraded my weblog on blogger.com to the "New Blogger" the BlogThis! button on my Google toolbar stopped working for me. After some trouble, I was able to sign into my Google account - but the marked text on a given website that I wanted to quote plus the link to the website never showed up like it used to under the old blogger.
The Performancing tool fixed this for me. Even a picture made it very nicely and without any problem.