Index: branches/RC/core/units/users/users_event_handler.php
===================================================================
diff -u -r11355 -r11375
--- branches/RC/core/units/users/users_event_handler.php	(.../users_event_handler.php)	(revision 11355)
+++ branches/RC/core/units/users/users_event_handler.php	(.../users_event_handler.php)	(revision 11375)
@@ -738,7 +738,7 @@
 			$object =& $this->Application->recallObject('u', null, Array('skip_autoload' => true)); // TODO: change theme too
 			/* @var $object UsersItem */
 
-			if (preg_match("/^[_a-zA-Z0-9-\.]+@[a-zA-Z0-9-\.]+\.[a-z]{2,4}$/", $friend_email))
+			if (preg_match('/^(' . REGEX_EMAIL_USER . '@' . REGEX_EMAIL_DOMAIN . ')$/i', $friend_email))
 		    {
 				$send_params = array();
 				$send_params['to_email']=$friend_email;
@@ -795,7 +795,7 @@
 		function OnSubscribeQuery(&$event)
 		{
 			$user_email = $this->Application->GetVar('subscriber_email');
-			if (preg_match("/^[_a-zA-Z0-9-\.]+@[a-zA-Z0-9-\.]+\.[a-z]{2,4}$/", $user_email)) {
+			if (preg_match('/^(' . REGEX_EMAIL_USER . '@' . REGEX_EMAIL_DOMAIN . ')$/i', $user_email)) {
 
 				$object =& $this->Application->recallObject($this->Prefix.'.subscriber', null, Array('skip_autoload' => true));
 				/* @var $object UsersItem */
@@ -833,7 +833,7 @@
 			/* @var $object UsersItem */
 
 			$user_email = $this->Application->RecallVar('SubscriberEmail');
-			if (preg_match("/^[_a-zA-Z0-9-\.]+@[a-zA-Z0-9-\.]+\.[a-z]{2,4}$/", $user_email)) {
+			if (preg_match('/^(' . REGEX_EMAIL_USER . '@' . REGEX_EMAIL_DOMAIN . ')$/i', $user_email)) {
 				$this->RemoveRequiredFields($object);
 				$object->Load($user_email, 'Email');