@michelled, IE does complain about the event name being undefined. It doesn't affect use of the player, but it does produce that error icon in the corner. I'll make the listener conditional on the event existing.

It's my understanding that we actually activate the fullscreen in response to the change in the model (the button updates the model, and a modelChange listener responds by requesting fullscreen). If we wanted update the model in response to switching into fullscreen, we'd have to think about how to change that.