I got the Xbox360 holiday bundle this month, and I am having issues with my controller. I have replaced the batteries 3 times now, but it will constantly desync itself from my system. The controller doesn't turn off or lose power, the ring in the middle will flash repeatedly until I hold it down and the system resyncs. It happens when playing offline and online (the most frustrating times during BF3!). I have the 360 located in front of me, roughly equal height from where I am hold the controller, so I don't think it's a line of sight issue, and I sit maybe 1-5 feet from my console.