I was logged in as admin and then tried logging in to the front end. I entered a wron password and got this error page:
Duplicate entry '1D5sX9BqsiZWwwsWpxb2' for key 'series' SQL=INSERT INTO `w4s8u_user_keys` SET `user_id` = 'admin' , `series` = '1D5sX9BqsiZWwwsWpxb2' , `uastring` = 'f6341755871ac5eea737b617f05fd102' , `time` = 1420551062 , `token` = '$2y$10$l4HHCiXQBz5fS1.pb05BSO2SrPjqzZZaPbi5MLfUhiVIZoPVtbrx.
Logging in with the correct password does not give an error.....