Index: ext_localconf.php
===================================================================
--- ext_localconf.php	(revision 4167)
+++ ext_localconf.php	(working copy)
@@ -24,6 +24,7 @@
 		// Initialize the caching framework. The caching framework is asking it self if it is initialized already before initializing.
 	t3lib_cache::initializeCachingFramework();
 
+	$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['sys_workspace_cache']['frontend'] = 't3lib_cache_frontend_VariableFrontend';
 	$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['sys_workspace_cache']['backend'] = 't3lib_cache_backend_DbBackend';
 	$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['sys_workspace_cache']['options'] = array(
 		'cacheTable' => 'sys_workspace_cache',
Index: ChangeLog
===================================================================
--- ChangeLog	(revision 4167)
+++ ChangeLog	(working copy)
@@ -1,3 +1,6 @@
+2011-02-21  Marco Bresch <typo3@starfinanz.de>
+	* Fixed bug #13074: missing cache_frontend configuration
+
 2011-02-20  Tolleiv Nietsch  <typo3@tolleiv.de>
 
 	* Fixed bug #13098:Hide sys_workspace_stage in list view (Thanks to Andreas Kiessling)
Index: Classes/Service/GridData.php
===================================================================
--- Classes/Service/GridData.php	(revision 4167)
+++ Classes/Service/GridData.php	(working copy)
@@ -191,7 +191,7 @@
 			try {
 				$GLOBALS['typo3CacheFactory']->create(
 					'workspaces_cache',
-					't3lib_cache_frontend_StringFrontend',
+					$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['sys_workspace_cache']['frontend'],
 					$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['sys_workspace_cache']['backend'],
 					$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['sys_workspace_cache']['options']);
 			} catch (t3lib_cache_exception_DuplicateIdentifier $e) {