I've used both .37 and .42 beta (currently on my 8100 still) and I've gotten better performance results by wiping the phone completely before updating. Even with .37, I did not wipe it, and my LED would stay RED the whole time, 24/7. I wiped the phone, reinstalled .37 and LED worked properly after that.

.42 seems to have fixed the Browser issue, having trouble entering text in a field. But camera is still screwed up!!! that's the only thing for me that needs to be fixed, it works really fast and smooth. Also 3rd party custom themes get rearranged when you click the menu key, I hope they fix it, instead of having every theme out there rewritten.

dont have many, but all my 3rd party apps work fine, Google Maps, BBWeather, Beyond 411, and the new flickr app works good too.