I too reverted back to 0514. The newer build gave me Wifi issues, that while could be worked around, were just a pain, also, having force close issues, and SD card mounting problems, every hr or so my phone would say SD card unexpectadly removed. None of those issues with 0514 for me, I'm running it w/o the kernal OC'd, so just at 710. But even at 710 is seems pretty snappy!
I think a lot has to do with my SD card itself though. My wife has a 32 gig that works with the new PG build just fine, no errors, force closes issues, just wifi prob that can be worked around with a static IP.
I think they are all pretty awesome though, and BIG thanks for everyone that puts all that time an effort into helping us make our little POS phones a little better!!!