I also have had the same problem ever since I updated to the new firmware. Tried everything under the sun. Does the same thing weather the compos was on or off. Also tried several other things over the last few months, but the only thing that worked, for a little while, would be just to turn it off then on when its starts to act up while I was caching. I will probably continue to this until the new firm ware comes out. Gotta love updates...