I found out the problem...!!!
Well not that much, but at least how to solve it and how to reproduce the error
It never happened to me until I did "alt + enter" to window the game, and then "shift + esc" to free the mouse pointer from the game... AFTER that, it happens every time you play the game (even if you don't use alt + enter anymore)
To FIX the problem you can erase your .cfg and let oa to generate a new one... I guess its some variable that oa adds after you do alt + enter and shift + esc"
Ill run "diff" later to see if I can find out what variable is messing the game. Im tired now
(I use ubuntu btw)