[lordicon2001]

Originally Posted by peugeot405

what's the link to the site?



check additional.css for following code:

.navtabs li.selected a.navtab {


}

Yep you found that
.navtabs li.selected a.navtab
{
background: #1E1E1E; /* Old browsers */
background: -moz-linear-gradient(top, #4384b7 0%, #055b9f 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#4384b7), color-stop(100%,#055b9f)); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, #4384b7 0%,#055b9f 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, #4384b7 0%,#055b9f 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, #4384b7 0%,#055b9f 100%); /* IE10+ */
background: linear-gradient(to bottom, #4384b7 0%,#055b9f 100%); /* W3C */
filter: progidXImageTransform.Microsoft.gradient( startColorstr='#4384b7', endColorstr='#055b9f',GradientType=0 ); /* IE6-9 */

}

However I still need to know where I can change the transparent background behind the threads. I am looking in the additional.css now but not sure what to look for