Themes are not displayed correctly on iTunes 11
Chosen theme is not displayed on iTunes U, version 11 for some collections
See below for collection
https://itunes.apple.com/fr/itunes-u/prof.-yunus-conference-2012/id586627154?mt= 10
Should be displayed in black:
Preview is correct (but is displayed like in iTunes version 10):
But the real one is not correct (see below)