Just "upgraded" to itunes 10.6 in effort to get my iPhone to see all of my iTunes matched songs. (iPhone doesn't see certain matched songs, even if they have been deleted and redownloaded as matched AAC files.) Well after this latest "update" I lost my ability to deletemusic and redownload as upscaled AAC files. I can still delete, and redownload, but it doesnt upscale anymore! I am running iTunes on Windows 7.