iTunes shows 1 available download

Hi,

I have an iPhone 4S and an iPad2, both updated to 6.1.2, factory unlocked, non-JB.

Desktop with Win7 and latest iTunes.

I have 3 different iTunes accounts (long story), one of them is the default (the one I normally use on both devices as well as on my desktop).

iTunes shows that there's an available download.

I've logged in to all 3 accounts and checked for available downloads, nothing.

I've used the iYunes account preferences to reset the store cache as well as the mesages. Did not help.

How can I check if there's a true available download after all, or to get rid of this annoying status, without reinstalling iTunes?

Thank you,

Daniel