Index: wp-admin/includes/file.php
===================================================================
--- wp-admin/includes/file.php	(revision 14168)
+++ wp-admin/includes/file.php	(working copy)
@@ -157,17 +157,17 @@
 		return trailingslashit($temp);
 
 	$temp = WP_CONTENT_DIR . '/';
-	if ( is_dir($temp) && is_writable($temp) )
+	if ( is_dir($temp) && @is_writable($temp) )
 		return $temp;
 
 	if  ( function_exists('sys_get_temp_dir') ) {
 		$temp = sys_get_temp_dir();
-		if ( is_writable($temp) )
+		if ( @is_writable($temp) )
 			return trailingslashit($temp);
 	}
 
 	$temp = ini_get('upload_tmp_dir');
-	if ( is_dir($temp) && is_writable($temp) )
+	if ( is_dir($temp) && @is_writable($temp) )
 		return trailingslashit($temp);
 
 	$temp = '/tmp/';