Index: includes/class_notification.php
===================================================================
--- includes/class_notification.php	(revision 1255)
+++ includes/class_notification.php	(working copy)
@@ -171,21 +171,24 @@
 		$masterids = array_merge($this->roles['-notapplicable-'], $this->roles['reporter'], $this->roles['assignee'], $this->roles['favorite'], $this->roles['voter'], $this->roles['commenter']);
 		$masterids = $this->registry->funct->array_strip_empty(array_unique($masterids));
 		
-		$userinfo = $this->registry->db->query("
-			SELECT user.*, useremail.*
-			FROM " . TABLE_PREFIX . "useremail AS useremail
-			LEFT JOIN " . TABLE_PREFIX . "user AS user
-				ON (user.userid = useremail.userid)
-			WHERE useremail.userid IN (" . implode(',', $masterids) . ")
-		");
-		while ($user = $this->registry->db->fetch_array($userinfo))
+		if (is_array($masterids) AND sizeof($masterids) > 0)
 		{
-			if (!is_array($this->users["$user[userid]"]))
+			$userinfo = $this->registry->db->query("
+				SELECT user.*, useremail.*
+				FROM " . TABLE_PREFIX . "useremail AS useremail
+				LEFT JOIN " . TABLE_PREFIX . "user AS user
+					ON (user.userid = useremail.userid)
+				WHERE useremail.userid IN (" . implode(',', $masterids) . ")
+			");
+			while ($user = $this->registry->db->fetch_array($userinfo))
 			{
-				$this->users["$user[userid]"] = $user;
-				unset($this->users["$user[userid]"]['mask'], $this->users["$user[userid]"]['relation']);
+				if (!is_array($this->users["$user[userid]"]))
+				{
+					$this->users["$user[userid]"] = $user;
+					unset($this->users["$user[userid]"]['mask'], $this->users["$user[userid]"]['relation']);
+				}
+				$this->users["$user[userid]"]['options']["$user[relation]"] = $user['mask'];
 			}
-			$this->users["$user[userid]"]['options']["$user[relation]"] = $user['mask'];
 		}
 	}