I hope they have quite a few fixes in the pipeline. I was just thinking this week that they have a lot of work to be done on SL before the GM is released. Makes me nervous for how much software will break upon release. I have been using all the builds on my primary machine. Some are much more stable then others. The recent is stable but has lots of issues with 3rd party software crashing on it (pity for adobe, their stuff always breaks first)