thank you, thank you! you have solved a problem that i've had for over two years - ever since i migrated my content from an older mac to my current one. everything sync'd ok except tv shows. i scoured the forums with no luck and eventually just gave up and loaded that content over wifi directly to my iphone and gave up trying to sync from my computer with itunes.
after reading this post i went and looked in /Users/Shared. i had both a "SC info" and "SC info~orig" directory. i stopped itunes, removed both of them, restarted itunes, reauthorized my machine and it all worked! i can sync tv shows again. amazing. i had a workaround but this has been bugging me and bugging me.
i do think the suggestion to deauthorize your current computer before starting this process is a good one. i did *not* remember to do that, and when i looked at the count as i was reauthorizing my computer it's 1 too many. i'm still under 5 so i'll leave it for now, but at some point i'll have to deauthorize everything and reauth to get the count right.
but yay! thanks for sharing a fix that actually works. no more burning sage leaves or voodoo dances around my computer...