No check for existing users/email, denied users/email and correct email-address

Because this module overwrites the default user validation (user_register_validate), a user can be added with an incorrect email-address.
Also you'll get a database error when registering with an already existing user name.

The complete "_user_edit_validate"-function is never executed which is probably unwanted behavior...

This is a big problem in combination with the content-profile module;
The guest-account gets a profile-node when someone adds a user with an incorrect email-address or existing user name.
After that it is impossible to add users (or registering)