Recently, I have uploaded 3 gb of music on to my ipod along with 11 gb of data (in the main ipod folder). After, the album art is not showing on my ipod (even though it does on my itunes), instead it just shows the gray music sign as if I have no cover art or sometimes a reddish type of corrupt data; why is this? is it because it's lagging too much (I still have 25 gb of free space) or because of some software error? I am not talking about cover flow, just normal scrolling. Thank you!