I have an x-arcade tankstick and I notice when I play mame, i cant press all buttons at the same time. I find that if player 2 is holding down all buttons, then player 1 is limited to 1 or 2 buttons they can press, and vice versa. I use mame64 .138 and maximus arcade frontend. I was wondering if anyone else had this issue. Im not sure if its mame, or my x-arcade stick. I didnt really notice it untill I played hangtime and had problems when trying to shoot when the other player was trying to go up for an ally-oop.