Found it. It seems like, even though the display is 300x300, the player can't handle that size for an image. It seems like anything more than 200 pixels wide won't display (I tried 200x200 and 200x214 and it worked, but 210x210 doesn't, for example.) So I wasted a lot of time adding 300x300 art on several albums back in the 1.04 days. Oh and, since the display is still at 300x300, it resizes the image and it doesn't look all that great on screen.