Thanks for reply. I'm not a developer - my friend who is added my iPad's UDID on his account. I begged him to do so as I wanted multitasking and my country's (Czech) keyboard.

Hi there, anyone experiencing the same issue? I am on the latest official release of iTunes, but it keeps refusing to update - it says something like "your device is not compatible" error. Tried it on both, Mac and PC, but failed...