OnTV crashes on startup (ElementTree module not available?)

Binary package hint: ontv

OnTV cannot start due to the ElementTree module being unavailable.

The output from this is as follows:

/usr/lib/python2.4/site-packages/ontv/xmltv.py:24: RuntimeWarning: Python C API version mismatch for module cElementTree: This Python has API version 1013, module cElementTree has version 1012.
  from cElementTree import ElementTree, Element, SubElement, tostring
Traceback (most recent call last):
  File "/usr/lib/ontv/ontv", line 29, in <module>
    from ontv import Main
  File "/usr/lib/python2.4/site-packages/ontv/Main.py", line 34, in <module>
    from OnTVApplet import OnTVApplet
  File "/usr/lib/python2.4/site-packages/ontv/OnTVApplet.py", line 29, in <module>
    from XMLTVFile import XMLTVFile
  File "/usr/lib/python2.4/site-packages/ontv/XMLTVFile.py", line 28, in <module>
    import xmltv
  File "/usr/lib/python2.4/site-packages/ontv/xmltv.py", line 24, in <module>
    from cElementTree import ElementTree, Element, SubElement, tostring
ImportError: cannot import name ElementTree

ProblemType: Crash
Date: Sat Jan 27 10:25:57 2007
DistroRelease: Ubuntu 7.04
ExecutablePath: /usr/lib/ontv/ontv
InterpreterPath: /usr/bin/python2.5
Package: ontv 2.2.0-0ubuntu2
ProcCmdline: python /usr/lib/ontv/ontv --oaf-activate-iid=OAFIID:GNOME_OnTVApplet_Factory --oaf-ior-fd=47
ProcCwd: /
ProcEnviron:
 LANG=en_GB.UTF-8
 LANGUAGE=en_GB:en
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/bin/X11:/usr/games
 SHELL=/bin/bash
PythonArgs: ['/usr/lib/ontv/ontv', '--oaf-activate-iid=OAFIID:GNOME_OnTVApplet_Factory', '--oaf-ior-fd=47']
SourcePackage: ontv
Uname: Linux coffeecup 2.6.20-5-generic #2 SMP Sat Jan 6 14:50:47 UTC 2007 i686 GNU/Linux