Form validation callback not working!

[eluser]CroNiX[/eluser]
Out of curiousity, why are you checking to see if the username is not false? Do you actually set it to boolean FALSE somewhere? Like if they aren't logged in or something? Maybe checking to see if its empty() would be better.

Code:

if ( $user = $this->musers->single ( $username ) != false )

to

Code:

if( ! empty($this->musers->single ( $username )))