yes, I think so. When I pressed "oemcomma" (what it said for comma) keycode for a button, it wasn't recognized in the game. I set up Mortal Kombat Project 4.1 and buttons "," for low punch and "." for low kick. So after joy mapping, setting up my button config, I ran MKP and when it wanted to do a low punch or a low kick, nothing happened. All of the other button configs worked but "," & "."