All forum members, nice to meet you. I am a phantom pilot resident in Japan. Please forgive my poor english,thanks. It is not listed in the homepage of DJI, but the firmware of the central board revises it. (V188.8.131.52)) I thought contents of the update probably "to have been the improvement of the self-check function of the electric system". I updated my bird yesterday, and today was the second flight. I tested all modes except the manual operation with NAZA mode, but there was not a problem at all. Flight distance and fpv feedback range achieved 720m=2362ft with according to specifications, FCC mode. My bird was entered RTH mode at around 800 feet temporarily on the way, but was able to do the intercept with the S1 switch, too.