Ticket #17397: 17397.diff

wp-admin/network/site-new.php

@@ -39 +39 @@
         if ( ! is_array( $_POST['blog'] ) )
                 wp_die( __( 'Can’t create an empty site.' ) );
         $blog = $_POST['blog'];
-        $domain = '';
-        if ( preg_match( '|^([a-zA-Z0-9-])+$|', $blog['domain'] ) )
-                $domain = strtolower( $blog['domain'] );
+        $domain = strtolower( $blog['domain'] );
 
         // If not a subdomain install, make sure the domain isn't a reserved word
         if ( ! is_subdomain_install() ) {