Of the last 3 firmwares, the 12/16 seem to be the best. I know they took it down, but it my early batch S3 up to 500G consistently. I think I will go back to that one. It was better than the 12/19.
OMG! Thank you thank you thank you Darthswan! - that firmware is stable as !
Glad I was able to assist. They need to take that fw and make it the standard.