boto/boto — pull request #877 by nsitarz (2012-07-20 05:22:47+00:00)
Title: Fix SNS add_permission parameter names

Calling add_permission will return a 400 error with the contents:

{"Error":{"Code":"MalformedInput","Message":"Top level element may not
be treated as a list","Type":"Sender"}}

Appending .member to the AWSAccountID and ActionName parameter names as
per the AWS docs
(http://docs.amazonwebservices.com/sns/latest/api/API_AddPermission.html
) solves the problem.