Hi there. I installed WordPress with Fantastico on DreamHost.
When I log in to the newly-created system and try to edit my user profile, I get the message
ERROR: This username is invalid. Please enter a valid username. after I make my changes and press the "Update profile" button.
The username in question is "ac-admin". I'm unable to change it in the "update profile" form. This means that I can't change my profile until I change my username, but I can't change my username. Hyphens are apparently verboten in usernames, and Fantastico skipped that check when it installed WordPress. That's Fantastico's problem, but it would be great if WordPress could take this into account by letting my mal-formed username slide whenever possible.