OK, so I have my GH2 hacked with 44Mb CBrandin hack, if that's relevant. I can't turn off "highlight" feature (flashing white to tell you it's peaking white), which is really annoying to shoot with. I realise that it's telling me for my own good, but is this normal for it to be stuck on with the hack?
OK, I reset all settings, re-formatted card (again) and went through the menus re-assigning all of the values, and it works again now! Awesome advice. Thanks Vitaliy.