diff --git a/phpBB/adm/index.php b/phpBB/adm/index.php
index 77433c127a..352795a04b 100644
--- a/phpBB/adm/index.php
+++ b/phpBB/adm/index.php
@@ -106,6 +106,7 @@ else if (isset($_GET['pane']) && $_GET['pane'] == 'left')
 
 			@ksort($action_ary);
 
+			$row_class = '';
 			foreach ($action_ary as $action => $file)
 			{
 				if (!empty($file))
diff --git a/phpBB/includes/acm/acm_file.php b/phpBB/includes/acm/acm_file.php
index 883878b4b4..dfe31e6cc2 100644
--- a/phpBB/includes/acm/acm_file.php
+++ b/phpBB/includes/acm/acm_file.php
@@ -129,7 +129,7 @@ class acm
 			$this->load();
 		}
 
-		if ($expire_time > 0)
+		if ($expire_time > 0 && isset($this->vars_ts[$varname]))
 		{
 			if ($this->vars_ts[$varname] <= time() - $expire_time)
 			{
diff --git a/phpBB/includes/functions_admin.php b/phpBB/includes/functions_admin.php
index fcc91b814a..01bbd60836 100644
--- a/phpBB/includes/functions_admin.php
+++ b/phpBB/includes/functions_admin.php
@@ -1689,7 +1689,7 @@ function event_execute($mode)
 }
 
 // Extension of auth class for changing permissions
-if (class_exists(auth))
+if (class_exists('auth'))
 {
 	class auth_admin extends auth
 	{
@@ -1957,7 +1957,7 @@ if (class_exists(auth))
 	}
 }
 
-if (class_exists(template))
+if (class_exists('template'))
 {
 	class template_admin extends template
 	{