[Trent Adams]

I have done exactly what you are doing and cannot replicate this error with or without permalinks. What theme are you running and does it work if you only use the default theme? Are you using any plugins that are being displayed on the login page (as both login forms are displayed on that page)? Does your theme have login.php in it? If it does, what happens when you remove it for the default one?

Anyone else seeing this error by logging into the top form on login.php?

Trent