Index: branches/5.0.x/core/install/step_templates/select_theme.tpl
===================================================================
diff -u -N -r12117 -r12407
--- branches/5.0.x/core/install/step_templates/select_theme.tpl	(.../select_theme.tpl)	(revision 12117)
+++ branches/5.0.x/core/install/step_templates/select_theme.tpl	(.../select_theme.tpl)	(revision 12407)
@@ -15,8 +15,9 @@
 						$default_theme = 'default2007';
 					}
 
-					if (file_exists(FULL_PATH . '/themes/default2009')) {
-						$default_theme = 'default2009';
+					// default theme since 5.0.1
+					if (file_exists(FULL_PATH . '/themes/simple')) {
+						$default_theme = 'simple';
 					}
 				}