Rebuffering is primarily used to handle remote and direct streams, particularly radio station, when the player has got ahead of the stream source. There are a variety of causes of this. A possible cause is that the source stops transmitting and that the player or SC receive no network disconnect notification. Neither SC nor the player firmware has a mechanism to timeout such an inactive stream. The rebuffering code in SC should place an upper limit on how long it is prepared to wait before aborting playback of the current stream. Perhaps 30s?