That does sound about the point that the buffer would fill. If you watch a video that has stopped but start watching from just before the point it stopped last time, I'm guessing that it would continue past the point that it froze last time. This would indicate that something is preventing Streambaby from rebuffering when you hit this point, but I don't know what that might be. Does the position bar update correctly when playing a video? If not, this might indicate that Streambaby is not able to track where you are in the video.