diff --git a/phpBB/includes/emailer.php b/phpBB/includes/emailer.php
index d5732ce58e..2182ea6a8c 100755
--- a/phpBB/includes/emailer.php
+++ b/phpBB/includes/emailer.php
@@ -207,7 +207,7 @@ class emailer
 		// Build header
 		$this->extra_headers = (($this->replyto != '') ? "Reply-to: <$this->replyto>\n" : '') . (($this->from != '') ? "From: <$this->from>\n" : "From: <" . $board_config['board_email'] . ">\n") . "Return-Path: <" . $board_config['board_email'] . ">\nMessage-ID: <" . md5(uniqid(time())) . "@" . $board_config['server_name'] . ">\nMIME-Version: 1.0\nContent-type: text/plain; charset=" . $this->encoding . "\nContent-transfer-encoding: 8bit\nDate: " . gmdate('D, d M Y H:i:s Z', time()) . "\nX-Priority: 3\nX-MSMail-Priority: Normal\nX-Mailer: PHP\nX-MimeOLE: Produced By phpBB2\n" . (($cc != '') ? "Cc:$cc\n" : '')  . (($bcc != '') ? "Bcc:$bcc\n" : '') . trim($this->extra_headers); 
 
-		$to = ($to == '') ? "<Undisclosed-recipients:;>" : $to;
+		$to = ($to == '') ? "undisclosed-recipients:;" : $to;
 
 		// Send message ... removed $this->encode() from subject for time being
 		if ( $this->use_smtp )
diff --git a/phpBB/includes/functions_post.php b/phpBB/includes/functions_post.php
index d1427c012d..3be9937015 100644
--- a/phpBB/includes/functions_post.php
+++ b/phpBB/includes/functions_post.php
@@ -601,9 +601,9 @@ function user_notification($mode, &$post_data, &$topic_title, &$forum_id, &$topi
 			$user_id_sql = '';
 			while ($row = $db->sql_fetchrow($result))
 			{
-				if (isset($row['ban_userid']))
+				if (isset($row['ban_userid']) && !empty($row['ban_userid']))
 				{
-					$user_id_sql = ', ' . $row['ban_userid'];
+					$user_id_sql .= ', ' . $row['ban_userid'];
 				}
 			}
 
diff --git a/phpBB/includes/usercp_email.php b/phpBB/includes/usercp_email.php
index 6117e9ef06..afe21ef59d 100644
--- a/phpBB/includes/usercp_email.php
+++ b/phpBB/includes/usercp_email.php
@@ -178,7 +178,7 @@ if ( $result = $db->sql_query($sql) )
 			'USERNAME' => $username,
 
 			'S_HIDDEN_FIELDS' => '', 
-			'S_POST_ACTION' => append_sid("profile.$phpEx?&amp;mode=email&amp;" . POST_USERS_URL . "=$user_id"), 
+			'S_POST_ACTION' => append_sid("profile.$phpEx?mode=email&amp;" . POST_USERS_URL . "=$user_id"), 
 
 			'L_SEND_EMAIL_MSG' => $lang['Send_email_msg'], 
 			'L_RECIPIENT' => $lang['Recipient'], 
diff --git a/phpBB/includes/usercp_register.php b/phpBB/includes/usercp_register.php
index 9ad3df588b..31c303ed40 100644
--- a/phpBB/includes/usercp_register.php
+++ b/phpBB/includes/usercp_register.php
@@ -49,8 +49,8 @@ function show_coppa()
 		"AGREE_UNDER_13" => $lang['Agree_under_13'],
 		'DO_NOT_AGREE' => $lang['Agree_not'],
 
-		"U_AGREE_OVER13" => "profile.$phpEx?mode=register&amp;agreed=true",
-		"U_AGREE_UNDER13" => "profile.$phpEx?mode=register&amp;agreed=true&amp;coppa=true")
+		"U_AGREE_OVER13" => append_sid("profile.$phpEx?mode=register&amp;agreed=true"),
+		"U_AGREE_UNDER13" => append_sid("profile.$phpEx?mode=register&amp;agreed=true&amp;coppa=true"))
 	);
 
 	$template->pparse('body');