I have just tried 5.08 and found that at the recommended idle speed, the 3 anti-clockwise motors didn't spin up. After increasing idle speed, they all spun up.
Then after a 5 minute flight, I checked the motor temps and found that the 3 clockwise motors were warm to the touch, the other 3 were cold. The esc's were the same, 3 cold, 3 warm.
I'm not sure why they introduced this idle speed, because it worked just fine as it was. Does anyone know the reason? Hopefully a fix will be released soon.
Gunter.