Polylang : bug with pagelines again

Hi,
I’m still struggling to use polylang with pagelines
As soon as I activate polylang I get the following error :

Warning: strpos() expects parameter 1 to be string, object given in /home/www/d518b5d52d219ef566aebff6e0652023/web/wp-content/themes/pagelines/includes/class.render.css.php on line 333

Warning: rtrim() expects parameter 1 to be string, object given in /home/www/d518b5d52d219ef566aebff6e0652023/web/wp-includes/formatting.php on line 1381

I’ve read this topic : , and I’ve changed these lines (in …sections/navbar/section.php) :

if ( is_array( wp_get_nav_menu_items( $menu ) ) || has_nav_menu( 'primary' ) ) {
					wp_nav_menu(
						array(
							'menu_class'		=> 'font-sub navline pldrop ' . $align_class,
							'menu'				=> $menu,
							'container'			=> null,
							'container_class'	=> '',
							'depth'				=> 3,
							'fallback_cb'		=> ''
						)
					);

to this :

if ( is_array( wp_get_nav_menu_items( $menu ) ) || has_nav_menu( 'primary' ) ) {
					wp_nav_menu(
						array(
							'menu_class'		=> 'font-sub navline pldrop ' . $align_class,
							'container'			=> null,
							'container_class'	=> 'menu-header',
                                                  	'theme_location'	=> 'primary',
							'depth'				=> 3,
							'fallback_cb'		=> ''
						)
					);

but I still get the same error.

Have you a suggestion ?

http://wordpress.org/extend/plugins/polylang/