Occasionally when changing between loading screens or menu views I'll notice my cursor start to drift to the left (e.g., strafing left in a FPS, gliding left in a map screen). I take it that this shouldn't happen. If I gently nudge the left analog stick, it will reset back to normal. The stick isn't recalibrating back to center.
Is there an easy way to fix this? Is it a known issue? Is this covered under any recognized warranty? Did I wear it out? What's going on?