Try this:
Edit wp-content/plugins/qtranslate/qtranslate_hooks.php and add
add_filter('post_type_link', 'qtrans_convertURL');
somewhere between `add_filter(‘author_feed_link’, ‘qtrans_convertURL’);
add_filter(‘day_link’, ‘qtrans_convertURL’);
add_filter(‘get_comment_author_url_link’, ‘qtrans_convertURL’);
add_filter(‘month_link’, ‘qtrans_convertURL’);
add_filter(‘page_link’, ‘qtrans_convertURL’);
add_filter(‘post_link’, ‘qtrans_convertURL’);
`
