Webplayer Graphics Bug. Objects disappearing visually on movement.

http://i.imgur.com/J9iIZRT.gifv

Moving using wasd or jumping with the spacebar causes every object within the scene to cease to be rendered. The player can look around without causing the error. Interacting with object within the scene (such as picking up and moving the helmets) does not cause the error. The player is not falling through the floor and can move around after the objects become invisible. This error does not happen when the scene is run within the editor.

Any help would be much welcome.