Hello,
I have an ipod touch 64gb and also have the frustrating album art issue. I had avic 910's installed in both my company trucks and my employee has a 160 Ipod classic, his art shows perfectly.
Pioneer advertises that there artwork will "display beautifully" and is compatible with Ipod touch and Iphone. As we have all seen this is not the case.
I am 99% sure that this issue is thumbnail related and specifically determined by which ipod you're using, it seems the Ipod touch and Iphone are susceptible to this problem.
I am sure there is a way to rectify this, and if every