I install the latest version3.0.10 and have the same error.And replace
get_users( array( 'blog_id' => 1, 'role' => 'administrator' ) );
with
`get_users( array( ‘blog_id’ => 1, ‘role’ => ‘administrator’, ‘fields’ => ‘all_with_meta’ ) );’
then it can work.(wordpress version 3.3.1).
thanks