Securelogin prevents creation of users and destroys user-data field in database and saves password in clear

When creating a new user as admin and having the plugin enabled to only allow https, I get an Drupal error that the user's data is invalid/the user cannot instanciated and can not login. Can't redproduce the message right now.

When looking at the mysql table I see the users password in cleartext in the 'data' field together with other data. I have to delete the field contents using plain SQL so that the user can log in again. I am using drupal 6.13. and hat to replace the module by an apache redirect :|