i was wrong, the above does not quite work. but our friends from the app engine team have told us:
Another way to deal with it is to use the --default_partition="" flag rather than using an older version of the sdk. http://code.google.com/appengine/forum/?place=topic%2Fgoogle-appengine%2FkJGPWT4fhgw%2Fdiscussion cfh

