Thank you, it really helped. The problem was in responsive CSS instead of main theme CSS.
And one more wish: is there any possibility that you could add a caption under/above the logos into the carousel?
* has rectangular background 😀
Neither ‘plugins_loaded’ nor ‘after_setup_theme’ replacing ‘wp_head’ on line 37 in add_filter function doesn´t work for me (using WP 3.8 and Display widgets 2.02)