I could easily save state in the last stable version by pressing Shift and the needed Function key, this development version (4.0-5732) version now requires me to press 'Fn' key along with the two. Any help will be appreciated.
You could rebind the controls via Options -> Hotkey Settings
Also, I thought it was normal for laptops (assuming here, though this really applies to any keyboard that has some sort of 'Fn' key/toggle) to have to push the 'Fn' key before being able to use the function keys as such instead of whatever they're assigned to do (from toggling wifi to media control)
The thing is my laptop automatically registers it as function key when pressed as a combo, I saw the key bindings, but they were the same as they were in 4.0.2