KohanaPHP » Kohana v3.x

In Validation::check, you are stoping the rules if you find an error in a field:
But you are not checking for errors that are added manually.
You should add something like:
if( ! empty($this->_errors[$field]) ) {
break;
}
just after (or maybe before) this:
if ($passed === FALSE AND $error_name !== FALSE) {
...
}