Mac Gamepad Calibration?

[meathead]

I'm having trouble centering my gamepad analog sticks. They seem to work, but only in the upper-left area. Here is what happens:
Example video

Any ideas how to fix this? I looked for some calibration tools, but could find none.

[Billiard26]

It looks like an issue in the way Dolphin detects axis ranges on OS X.

[meathead]

I was thinking that might be it. Thanks for the help.