Sunday I made an update with the wowACE-Updater, since this Update, my RatingBuster does not work. A full reinstall and other stuff don't work too to get the addon working.
Can anyone say how I can find out, which addon/update RatingBuster 'killed'?
This is probably due to changes in StatsLogicLib for WotLK. I've seen RatingBuster break three different times this past week, then work again with subsequent updates. Just be patient, or get a release version of RatingBuster :)