This weekend watched a concert and decided to test out he em-1 12-40 combo. Was taking pictures every once and a while placing the camera back in the bag alternately. Left the camera in the bag for more an 30 mins, and as reached for my camera it was scorching hot! Turned it off right away until it got a bit cold and tried to shoot again after 15 mins or so. Everything seems to operate fine except for the proximity sensor in on EVF. It sometimes works and sometimes does not. Battery ran out so waited until I got home to further test it. Put in my E-m5 battery on the em1 and still the issue seems to be the same it sometimes work and couple of times did not. The next day brought it with me and still the same thing it sometimes works and sometimes does not. One thing I noticed is that after turning off the EVF option of auto switch and forcing it using the screen button, the proximity sensor started working again. 2nd day after the issue tried to replicate the proximity sensor issue and seems to have been resolved now. Anybody else had the overheating issue with side effects? What option would help prevent this overheat from happening again? I know em1 is freeze proof, but don't know if it is heat proof....? Any one had EVF proximity sensor issues?