diff --git a/phpBB/includes/functions_display.php b/phpBB/includes/functions_display.php
index 2a86e237a6..1a2a3d3617 100644
--- a/phpBB/includes/functions_display.php
+++ b/phpBB/includes/functions_display.php
@@ -53,7 +53,7 @@ function display_forums($root_data=array(), $display_moderators=TRUE)
 			continue;
 		}
 
-		if (!$auth->acl_gets('f_list', 'm_', 'a_', $row['forum_id']))
+		if (!$auth->acl_gets('f_list', 'm_', 'a_', intval($row['forum_id'])))
 		{
 			// if the user does not have permissions to list this forum, skip everything until next branch
 
diff --git a/phpBB/includes/session.php b/phpBB/includes/session.php
index 51992613bd..d32aceafa8 100644
--- a/phpBB/includes/session.php
+++ b/phpBB/includes/session.php
@@ -539,7 +539,7 @@ class auth
 		if (!is_int($forum_id))
 		{
 			$arguments[] = $forum_id;
-			$forum_id = false;
+			$forum_id = 0;
 		}
 
 		$acl = 0;
@@ -651,9 +651,9 @@ class auth
 
 			if ($global_hold == '')
 			{
-				for($i = 0; $i < $global_bits; $i++)
+				for($i = 0; $i < $global_bits / 8; $i++)
 				{
-					$global_hold .= '0';
+					$global_hold .= chr(0);
 				}
 			}