I am in the process of migrating an MT blog with multiple authors into WordPress-mu. The importer generally works fine. However there is a slight problem with how it handles multiple authors being imported.
Using a test installation, I imported from the MT export file, and when I was prompted to assign WP users to the detected MT authors, apparently all the imported posts were assigned to the first WP user that was defined only, even entries from a specific MT author I had assigned to a different WP user.
Is this a known problem that can be fixed, or is there a third-party plugin that can appropriately import all the entries/comments from Movable Type and correctly assign MT authors to WP users.