.slider_navigation header, .contenu.slideshow header {

	position: absolute;
	background: rgba(0,0,0,0.5);
	padding: 0px 2em;
	left: 3%;
	top: 1em;
	z-index: 4;
}

css/global.css

@@ -2435,6 +2435,10 @@ div#header .boiteBanniereGauche {
 	top: -6em;
 }
 
+.slider_navigation header, .contenu.slideshow header {
+	top: 1em;
+}
+
 .boite .actu header {
 	position: relative;
 	height: auto;