It would seem the version of anki in testing is indeed totally broken. It reliably breaks as I have already described above every time I restore a working backup of the ~/.anki directory.
Running the latest version of anki from git (download instructions at the bottom of this page http://ichi2.net/anki/) does work, although it has a minor problem where I cannot close the currently open deck. To open a new deck, I have to exit anki and restart. Clayton
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