I'm trying to make the separators for these tabs look good but I am miserably failing, I'd love some tips

( the tabs that say article 1, article 2, some pics, important notice, events. I'm currently using and image for the following:

#featured-nav li {
background: url(images/purple/featured-li-bg.png) no-repeat 1px bottom;

#featured-nav {
background: url(images/purple/featured-separator.png) no-repeat right 3px;
here is the site: http://www.at-tayyibaat.net/