My omd em1 is behaving strangely - lots of weird and irritating things like: focus point size keeps reverting to large, I can’t switch on eye focus, can’t allocate functions to buttons and other stuff I haven’t discovered.
I suspect it’s a firmware problem and I’d like to do a clean reinstall but can’t work out how to do it.
I have the latest firmware already but the firmware updater only updates and the manual and google are silent on it.
Any ideas how to do this?

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Ok - just discovered this only happens when I have keystone compensation activated. When I switch it off everything seems to revert to my normal settings.
I still think might be a firmware glitch.