I also noticed if you are viewing all the topics of a forum, if you click on the username that last posted in a topic, it still tries to take you to the "about me" page of the user that started the topic. NOT the username you clicked on.
The "About Me" Page is not created for all old users because we migrated these users from our old forums PhP program. Once you edit your page it will be saved. Yes the migration tool should do it.