doesn't work on WP 3.6.1 please update

As an alternative, you can edit qtranslate.php and change:

define('QT_SUPPORTED_WP_VERSION', '3.x');

to:

define('QT_SUPPORTED_WP_VERSION', '3.6.1');

It worked in my website: http://opistobranquis.info

Hope this helps.

Recent update to version 2.5.37 of the plugin works with WP 3.6.1 for me.