Changed all status to start with Uppercase letters, made 3 properties required. Changed all the status to start with Uppercase letters because they are publicly visible. Also changed required=True to False for created_by, modified_by property to allow site admin to create and modify tasks. Also changed required=True to False for history to allow history not to be written until the task is published.

A list of bugs is available in the Google App Engine SDK project on Google Code.

The issue tracker is at http://code.google.com/p/googleappengine/issues/.