SquareSite.com demo site:

Registered from Mambo ‘Login Form’ section logged in and out than tried to login from ‘CB Login’ section kept getting 'Incorrect username or password' when tried to register using CB registration kept getting 'The username/password already in use', however when registered a new account using CB registration was able to login using both Mambo and CB Login forms.

On another note registration forms are different there should be on unified registration form for everything (Mambo+SMF+CB)

Keep up the good work.