Problem manually turning a body.

I'm having a problem where if my player physics body is on a slight hill and moving forwards, I can't turn very well. It tries to turn the opposite way when I turn.
Any ideas on how to fix this?

What kind of player-controller are you using?

I'm turning the player with the mouse, and it works fine as long as I'm on even ground.

are you using setPositionOrientation(...)? Because this can cause this kind of problems.

I am using setPositionOrientation but I fixed it by setting the material friction to 0.

using setPositionOrientation is bad idea!! Because collision checks do fail if you do this.

Player controller is no trivial thing to implement, try using the built-in character controller by Julio, it is available in the demos.