Modifications

div#p-search { background:none; height: 40px;padding: 0 10px;margin:0;}

#preftoc, #preftoc li, div.vectorTabs span, div.vectorMenu h5 a, div.vectorTabs { background-image:none;}

div.vectorMenu {background-image:url('http://jolstatic.fr/starcraft2/mediawiki/images/fleche_down.png');}

div.vectorMenu ul { background:none; border:none;}