Still baffled with this issue:
I download a TV show from my laptop. The settings there say this is the main computer for buying items from i tunes store, but two computers are authorized to play purchased content.

My desktop: I can log ok, I see my name upper right. I authorized the dektop.

But when I click anything on the dropdown, (account, purchased items), —even after being already logged in —those log in fields reappear.

Which is not a problem except then I enter user/pass again, and the fields reappear again, and this goes in circles. Hence, I cannot access anything still with the desktop. Thanks, help!