I upgraded to iOS 5.1.1 yesterday, doing a full format, restore, and then restoring from my last backup. I'm trying to pull my music down, and it seems like some songs refuse to download. I get the "This item cannot be downloaded. The item you have requested is not available for download." error. I've disabled iTunes match on my 4S. I've Updated, Disabled, and Enabled it on my PC (Windows Vista). I've even gone so far as to purge my entire iTunes Match library (keeping my original files), then re-adding all of my music to my library & re-submitting to iCloud. None of this has resolved the issue. One of the tracks that I was originally stuck on, now works, but now other tracks on the same album aren't. Please help.