I am hearing early reports that AlbumMixer v1.10 has problems with iTunes Match and playlists. So far I haven't been able to reproduce this, but I am working on it. If you see any problems and can provide details, please comment here.
Update: Based on additional user reports, plus a lack of crash reports from Apple, I think this is an iOS or iCloud issue. Because of this and other current issues being discussed on Apple forums I cannot recommend signing up for iTunes Match at this time. If you decide to risk it, start by backing up your entire iTunes library. Apple seems to be refunding subscription fees to some users, but that won't be much of a consolation if you lose a large media library.