Well my E3 has been giving me a problem for a few months and it is getting worse. The f/stop will quit showing in the finder and also on the LCD screen. It is very annoying and I have tried several fixes, cleaning the contacts, tightning the screws on the mount and even trying to clean the switch. It seems worse during humid days and had gotten better as the winter weather came in, but today it was pretty bad.
I can push the lens release switch and the f/stop numbers will start showing again. So I am almost certain the problem is related to the switch. It is more than likely going bad or the spring behind it is losing tension. Any way I contacted Olympus and got the address to send it in and probably will next week.
I was under the impression it was a flat rate fee but was informed it was time and material.