Unless I'm mistaken, these updates are advertised as 'beta' versions and as such they are trial versions, or 'use at your own risk' type updates. Probs with this latest are well known and public - see Castle's thread on RC Monster.
They've been pretty reliable in the past, but that's no guarantee they're trouble free. Castle knows there's probs and they've said they're working on them and hope to release a better version in a week or so. At least they've made rollbacks easy.
http://www.rc-monster.com/forum/show...1&postcount=97
I always check Castle's thread on RC monster to see if a new FW update is having prpobs before dnloading. I'd rather wait til the bugs get sorted out.