diff --git a/phpgwapi/inc/class.egw_cache.inc.php b/phpgwapi/inc/class.egw_cache.inc.php
index d7e93622b7..bb2526e8ad 100644
--- a/phpgwapi/inc/class.egw_cache.inc.php
+++ b/phpgwapi/inc/class.egw_cache.inc.php
@@ -497,7 +497,7 @@ class egw_cache
 
 		if ($level != self::TREE) $level = self::INSTANCE;
 
-		//if (!isset($providers[$level]))
+		if (!isset($providers[$level]))
 		{
 			$params = $GLOBALS['egw_info']['server']['cache_provider_'.strtolower($level)];
 			if (!isset($params) && $level == self::INSTANCE && isset(self::$default_provider))
diff --git a/phpgwapi/inc/class.egw_cache_memcache.inc.php b/phpgwapi/inc/class.egw_cache_memcache.inc.php
index c4e5438a59..dcdfd92043 100644
--- a/phpgwapi/inc/class.egw_cache_memcache.inc.php
+++ b/phpgwapi/inc/class.egw_cache_memcache.inc.php
@@ -62,8 +62,9 @@ class egw_cache_memcache extends egw_cache_provider_check implements egw_cache_p
 		$ok = false;
 		foreach($params as $host_port)
 		{
-			list($host,$port) = explode(':',$host_port);
-			if (!$port) $port = 11211;	// default port
+			$parts = explode(':',$host_port);
+			$host = array_shift($parts);
+			$port = $parts ? array_shift($parts) : 11211;	// default port
 
 			$ok = $this->memcache->addServer($host,$port) || $ok;
 			//error_log(__METHOD__."(".array2string($params).") memcache->addServer('$host',$port) = ".(int)$ok);