Index: t3lib/extjs/class.t3lib_extjs_extdirectapi.php
===================================================================
--- t3lib/extjs/class.t3lib_extjs_extdirectapi.php	(revision 9492)
+++ t3lib/extjs/class.t3lib_extjs_extdirectapi.php	(working copy)
@@ -74,8 +74,8 @@ class t3lib_extjs_ExtDirectApi {
 			// look up into the cache
 		$cacheIdentifier = 'ExtDirectApi';
 		$cacheHash = md5($cacheIdentifier . $filterNamespace .
-			serialize($this->settings) . TYPO3_MODE);
-		
+			serialize($this->settings) . TYPO3_MODE . t3lib_div::getIndpEnv('HTTP_HOST'));
+
 			// with no_cache always generate the javascript content
 		$cacheContent = $noCache ? '' : t3lib_pageSelect::getHash($cacheHash);