Index: trunk/core/kernel/utility/unit_config_reader.php
===================================================================
diff -u -r4864 -r4867
--- trunk/core/kernel/utility/unit_config_reader.php	(.../unit_config_reader.php)	(revision 4864)
+++ trunk/core/kernel/utility/unit_config_reader.php	(.../unit_config_reader.php)	(revision 4867)
@@ -134,10 +134,9 @@
 
 		$this->includeConfigFiles($folderPath, $cache);
 		$this->ParseConfigs();
-
-		$this->CacheParsedData();
-
+		
 		if ($cache) {
+			$this->CacheParsedData();
 			$conn =& $this->Application->GetADODBConnection();
 			$conn->Query('REPLACE '.TABLE_PREFIX.'Cache (VarName, Data, Cached) VALUES ("config_files", '.$conn->qstr(serialize($this->configFiles)).', '.adodb_mktime().')');
 		}
@@ -410,7 +409,7 @@
 
 	function PreloadConfigFile($filename)
 	{
-		$config_found = file_exists(FULL_PATH.$filename) && ($this->configAllowed($filename) || defined('IS_INSTALL'));
+		$config_found = file_exists(FULL_PATH.$filename) && $this->configAllowed($filename);
 
 		if( defined('DEBUG_MODE') && DEBUG_MODE && constOn('DBG_PROFILE_INCLUDES') )
 		{
@@ -426,7 +425,7 @@
 		}
 		else
 		{
-			if($config_found) include_once(FULL_PATH.$filename);
+			if ($config_found) include_once(FULL_PATH.$filename);
 		}
 
 		if ($config_found) {
@@ -582,6 +581,11 @@
 		 */
 	function configAllowed($config_path)
 	{
+		if (defined('IS_INSTALL') && IS_INSTALL) {
+			// at installation start no modules in db and kernel configs could not be read
+			return true;
+		}
+		
 		$module_found = false;
 		if (!$this->Application->ModuleInfo) return false;