It's interesting to see how many people have songs that are still protected. I find that most of my protected tracks have been removed from the store. I guess that is one way to go DRM free, but really isn't fair to the consumer imo.
Now, this is interesting...
I have an album where I still own the protected version, even though the unprotected one is available for purchase. Today I checked the upgrade page and it's listing three songs from that album as available for upgrade, but not the rest of the album. Even more confusing is that one of the songs is listed as from the "greatest hits" rather than the actual album.
I'll check back next week and see whether it gives me the rest.