iTunes 11.0 (163) Failure to create new smart playlist

iTunes 11.0 (163) does not allow creation of new smart playlists. Attempts to do so result in a playlist of zero tracks no matter what the rules say.

Editing of an existing smart playlist created using an earlier versions of iTunes resulted in deletion all the tracks in the playlist. This happened to me (attempting to investigate the problem with creation of new smart playlists in version 11.0 of iTunes) I attempted to edit an existing playlist. I edited the maximum number of tracks in the playlist from "unlimited" to 10. This resulted in a playlist of around 12 tracks being reduced to zero tracks. I am unable to reverse this change.

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