So I recently bought a 4gb slim 360 to replace my old one that started having drive issues, and I've noticed recently that it makes and odd noise at the dashboard, It sounds like a piece of plastic rattling against a fan. As soon as I start a game up it stops immediately, whether it's installed to the hdd or not. After doing a little troubleshooting, it seems that it only does it when I have a disc in the drive, if I open the tray and/or close it without a disc inside, it doesn't make a sound, so I think it's the disc rattling around. I've tried it with multiple discs so I know it's not just the one. Is this something I should worry about? The quick fix would be to take the disc out after I'm done playing, but I've only had this xbox for about 2 months now, so I want to get it taken care of if it's something serious.