We've long had an option in the User CP for users to set whether they want the postbit (which includes your username, avatar, etc.) on top of messages, or to the left. Due to various changes in our forum software, however, it's been a long time since it's actually worked.
In any event, the option now works as it should, so in case you've forgotten (and want to change your setting), go to your User CP and change the postbit location (under Thread Display Options).
In any event, the option now works as it should, so in case you've forgotten (and want to change your setting), go to your User CP and change the postbit location (under Thread Display Options).