diff --git a/core/Core.php b/core/Core.php
index 02956db90..966f08539 100755
--- a/core/Core.php
+++ b/core/Core.php
@@ -15,13 +15,13 @@ function getTempFolder() {
     }
     
     $ssTmp = "$sysTmp/silverstripe-cache";
-    if(!file_exists($ssTmp)) {
+    if(!@file_exists($ssTmp)) {
     	@$worked = mkdir($ssTmp);
     }
     if(!$worked) {
     	$ssTmp = dirname(dirname($_SERVER['SCRIPT_FILENAME'])) . "/silverstripe-cache";
     	$worked = true;
-    	if(!file_exists($ssTmp)) {
+    	if(!@file_exists($ssTmp)) {
     		@$worked = mkdir($ssTmp);
     	}
     }
diff --git a/core/Session.php b/core/Session.php
index 0c141f051..16b99dbbc 100644
--- a/core/Session.php
+++ b/core/Session.php
@@ -42,6 +42,11 @@ class Session {
 	
 	public static function get($name) {
 		$names = explode('.', $name);
+		
+		if(!isset($_SESSION)) {
+			return null;
+		}
+		
 		$var = $_SESSION;
 
 		foreach($names as $n) {
diff --git a/main.php b/main.php
index d108f2908..283d9efb8 100644
--- a/main.php
+++ b/main.php
@@ -37,7 +37,7 @@ Session::start();
 
 $envFiles = array('../_ss_environment.php', '../../_ss_environment.php', '../../../_ss_environment.php');
 foreach($envFiles as $envFile) {
-        if(file_exists($envFile)) {
+        if(@file_exists($envFile)) {
                 include($envFile);
                 break;
         }