One strong complain I have against the Fuji X100 is the focus mode switch. It has 3 settings - MF, AF-S and AF-C. I keep it at AF-S most of the time but every once in a while I use MF for taking quick shots when walking around. But when I want to switch from MF back to AF-S, it rarely happens. The slider does not stop at AF-S but slides all the way to AF-C. I have to slowly and gently move the slider so that it stops in the middle. Even with that, I have to move the slider a couple of times before I mange to stop it at the middle position.
This is really a minor issue but it is definitely annoying. And unfortunately, it cannot be fixed with firmware.
Or maybe it has something to do with my big finger. That cannot be fixed with firmware too.