Hi, Having a problem with my new EM1. I have the aperture on the rear wheel and I find that it doesn't always respond when turning. Click three time to go up in aperture (or down) and it might have moved 1/3 of a stop or 2/3 or sometimes not at all, other times moves correctly. Very frustrating. Have contacted Olympus and have been advised to post it to them. Front wheel appears fine. Anyone else having this problem?