(solved) If you get an error message "The submitted form was invalid" when trying to log in: find the cookie settings for your browser and delete the coolie for Maulepilots.org. That lets you log back in
MAC: click Safari > Preferences >Privacy > (under cookies) Manage website data - then delete the Maulepilots.org cookie
IPAD/IPHONE: click Settings > Safari > Clear History and Website Data

UPDATE: you should NOT have to do this anymore. Cookie is deleted on the board and will be re-created automatically
Christine