Hi,
some of my members seemed to have bookmarked the /login/ page, so they think they have to login each time they visit the site, thinking "Keep me signed in" is not working. Well obviously they are already signed in, but are browsing to the wrong page.
For a better user experience, it would make sense to tell them "You are already logged in" instead of showing them the Username+Password fields, or redirect them to the home-page instead....