Different versions of ctypes

When I run elisa I get an exception as follows:

WARN MainThread gst_metadata_slave_process_protocol okt 18 12:07:01 Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/elisa/plugins/amp/slave.py", line 19, in <module>
    sys.exit(main())
  File "/usr/lib/python2.5/site-packages/elisa/plugins/amp/slave.py", line 10, in main
    runner = namedAny(runner)
  File "/usr/lib/python2.5/site-packages/twisted/python/reflect.py", line 426, in namedAny
    topLevelPackage = _importAndCheckStack(trialname)
  File "/usr/lib/python2.5/site-packages/twisted/python/reflect.py", line 377, in _importAndCheckStack
    return __import__(importName)
  File "/usr/lib/python2.5/site-packages/elisa/plugins/gstreamer/amp_slave.py", line 23, in <module>
    from elisa.plugins.gstreamer.amp_protocol import GstMetadataSlaveFactory
  File "/usr/lib/python2.5/site-packages/elisa/plugins/gstreamer/amp_protocol.py", line 22, in <module>
    from twisted.protocols.amp import Command, String, AmpList, Integer, Float
  File "/usr/lib/python2.5/site-packages/twisted/protocols/amp.py", line 168, in <module>
    from twisted.python import log, filepath
  File "/usr/lib/python2.5/site-packages/twisted/python/filepath.py", line 29, in <module>
    from twisted.python.win32 import ERROR_FILE_NOT_FOUND, ERROR_PATH_NOT_FOUND
  File "/usr/lib/python2.5/site-packages/twisted/python/win32.py", line 160, in <module>
    formatError = _ErrorFormatter.fromEnvironment().formatError
  File "/usr/lib/python2.5/site-packages/twisted/python/win32.py", line 120, in fromEnvironment
    from ctypes import WinError
  File "/usr/lib/python2.5/site-packages/ctypes/__init__.py", line 20, in <module>
    raise Exception, ("Version number mismatch", __version__, _ctypes_version)

This exception is raised from within ctypes and it seems like the /usr/lib/python2.5/lib-dynload/_ctypes.so file from the package python2.5 and the file /usr/share/pyshared/ctypes/__init__.py (/usr/lib/python2.5/site-packages/ctypes/__init__.py is a symbolic link to that file) from python-ctypes has different versions.

The python2.5 package is version 2.5.2-11.1ubuntu1
The python-ctypes is version 1.0.2-5ubuntu2

/usr/share/pyshared/ctypes/__init__.py sets:
__version__ = "1.0.2"

While in the shared object file _ctypes.so:
$> grep 1.0.2 /usr/lib/python2.5/lib-dynload/_ctypes.so
 - gives no match
$> grep 1.0.3 /usr/lib/python2.5/lib-dynload/_ctypes.so
Binary file /usr/lib/python2.5/lib-dynload/_ctypes.so matches