In the attached mfa, the joystick appears in the bottom left. You have to touch it to be able to drag the joystick position but as soon as you do the reported position is not correct. While holding the joystick the touch zone is above by about 50 or so pixels.
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Testing on a Nexus 7, I've set the screen resolution to exactly half size (although the button bar at the bottom appears to take up some of that space - switching status bar seems to pop it back in). I've also set the app to resize the window so it stretches the window up to the Nexus 7's screen resolution and I think it is this (and possibly the Nexus button bar at the bottom) that is causing the joystick positioning problem.
