Raycast Hit App Crashes on touch

Hey everybody,

i use a raycasthit to check if any of my mesh collider was hit. here is the code:

 for(int i = 0; i < Input.touchCount; i++)
             {
                 currTouch = i;
                 if(Input.GetTouch(i).phase == TouchPhase.Began)
                 {
                     ray = Camera.main.ScreenPointToRay(Input.GetTouch(i).position);
                     if(Physics.Raycast(ray, out rayHitInfo))
                     {
                         rayHitInfo.transform.gameObject.SendMessage("OnTouchBegan3D");
                     }
                 }
             }

this works fine in unity 4.1.1 but when I use it in 3.5.4 (i am stuck to that due to a plugin licensing issue) and build it in xcode the app crashes when i touch anywhere on the screen.

Any idea how this could happen?

thanks in advance for your answers.