[rschiks]

Very strange, now that I did exactly as you said " You could set a background with the options button -> select fan art in the movie information screen."
I did this to one of my movies but nothing happened then I went to the options where I can remove the blur option, suddenly all background was there again. If I enable blur it goes then back to black screen again.

As you can see in post #2041 (a screen shot from someone else :-) ) the blur effect can make it very dark:



And when setting the slider of transparency higher it will be even darker (when a movies screen is put over it):



And if the light settings of iPad is also set to dark.....I can imagine you won't see the background at all.