Eric, I just looked at the default settings in version 0.8 beta 1 and noticed that you have a checkbox 'Auto-populate the username field ... matching URLs'. Would that be all URLs, since this is default, or would this be none because no URLs will match the setting, since there is no URL field on there to match ?
I am not quite sure what this checkbox is supposed to do. I am sure that there is a good reason for it, but I do not see it yet.