Game crashes when player moves through doorway or tunnel

Is anyone else experiencing this? I'm using Playmaker and Camera Path Animator to move an OVRCameraRig (Oculus Rift player prefab). Everything runs smoothly, but when the camera moves under a doorway or through a tunnel, the game completely locks up. Here is my system info:

Macbook Pro
OSX 10.9.5
2.5 GHz i7
8 GB 1333 MHz DDR3

Unity 4.5.5f1

Oculus SDK 0.4.3

Any help would be greatly appreciated.

Jesse