Google made some changes to the code of Picasa Web Albums to improve the speed and responsiveness. Now, if you visit any album or slideshow; you should notice that browsing photos is significantly faster, even in full-screen mode. If you've got a reasonable connection to the Internet, you should be able to hold down one of the arrow keys and zip through the entire album at a pretty good clip, flip-book style. Of course, while you could zoom past entire albums at ludicrous speed.