I'm only part way through the major bracket update (skinnable, scalable stuff), but I chopped off some progress into a new release that's up on Challonge.com. I bundled up the bracket controls to help keep things tidy and added scroll arrows for those who hate click-and-drag. The controls are a little lame at the moment, so they might get refaced down the road.
Most of my grunt work in this release should be transparent to users. More time than I anticipated was spent making the entire bracket scalable, and in preparation for allowing custom color schemes in bracket modules, all bracket lines are now drawn using borders instead of images.
The code is complete for reverting score submissions, but there's no front-end in place to take advantage of it at the moment. I did, however, add a warning message if you select a match winner who did not win the majority of games entered, so this should help cut down on mistakes.
In case you're wondering, I try to keep Challonge looking good in Firefox, Opera, IE 7+, and Chromium (usually covers most Webkit browsers like Safari). If something looks funny in your browser, please let me know... unless you're using IE6.