Sometimes, when I turn on my PS3 (120GB), and press the PS button, the four lights on the controller just....flash. This goes on for a couple more minutes, and then stops, and if I press the button again, it flashes again, and then stops. No connecting to the PS3 or anything. Sometimes plugging the controller in helps, although then it tends to connect, and if unplugged disconnect and start flashing again. So far turning it off, waiting for it to shut down, and then starting it up again has sorted this, and it connects no problem. Just wondering if anyone else has had the same problem, or if anyone knows why it happens?