cover art on purchased video not showing up on ipad

I have a first generation (yes, I know, sort of quill and parchment but, hey, it works just fine) Ipad, bought a movie from the Itunes store and the cover art didn't transfer. It shows up fine at the store, on my itunes account, and there is no other obvious explanation for this. I downloaded it a second time, same result. The movie plays just fine. Suggestions?