Ubuntu 7.04 - cannot import ListenDB after fresh install

[erratum]

Listen 0.6pre, rev 797 doesn't start the first time after install on Ubuntu 7.04. Some problem with the new adds in code in the player init.

error message :

david@davidportable:~$ listen
No musicbrainz support (tunepimp missing or version < 0.5) 
Traceback (most recent call last):
  File "/usr/lib/listen/listen", line 195, in <module>
    ListenApp()
  File "/usr/lib/listen/listen", line 166, in __init__
    from widget.listen import Listen
  File "/usr/lib/listen/widget/listen.py", line 32, in <module>
    from player import Player
  File "/usr/lib/listen/player/__init__.py", line 36, in <module>
    from library import ListenDB
ImportError: cannot import name ListenDB