Index: install.php
===================================================================
--- install.php	(revision 14988)
+++ install.php	(working copy)
@@ -998,7 +998,13 @@
 							}
 						}
 
-						// 3. upgrade admin skin
+						// 3. update all theme language packs
+						$themes_helper =& $this->Application->recallObject('ThemesHelper');
+						/* @var $themes_helper kThemesHelper */
+
+						$themes_helper->synchronizeModule(false);
+
+						// 4. upgrade admin skin
 						if (in_array('core', $modules)) {
 							$skin_upgrade_log = $this->toolkit->upgradeSkin($upgrade_data['core']);