This has probably been mentioned many times before .. but When in an Hv.Sv (at least) if i tab out of the game to change background video or look at email for instance, when i return - while my character is still in the vehicle, however the game does not know this, you end up in a half and half state, the avatar view moves within the vehicle but not with the vehicle - ie no vehicle control. specifically when i was in an hv - i got into continuous uncontrolled rolling so couldn't <F> out of the vehicle. workaround is easy as you just have to quit and re-enter empyrion. it is just annoying.
thx - i suspected this had been around for a while as no one seemed to mention it - just couldn't remember
I'm fairly sure you can remap it, I know it took me a couple of times getting caught out before I figured out what was happening.