diff -r beb0da036222 -r 8ebaa6c49745 plugins/admin/ThemeManager.php
--- a/plugins/admin/ThemeManager.php	Mon Jul 05 19:52:10 2010 -0400
+++ b/plugins/admin/ThemeManager.php	Tue Jul 06 00:51:40 2010 -0400
@@ -327,7 +327,7 @@
 			if ( !$q )
 				$db->die_json();
 			
-			if ( $theme_data['make_default'] )
+			if ( $theme_data['make_default'] && !defined('ENANO_DEMO_MODE') )
 			{
 				setConfig('theme_default', $theme_data['theme_id']);
 			}