We released a new version of the Python Client Library for Wave Robots API version 2, and it contained a number of fixes.
You can download the new version here:
http://wave-robot-python-client.googlecode.com/files/wave-robot-api-v2-03302010.zip
You can read more about the changes here:
http://code.google.com/p/google-wave-resources/wiki/RobotPythonClientLibraryChangelog