Hello,
Open style.css and find this code.
/*Cleancut*/
#top .fancyborder{position: absolute; z-index:99; display:block;}
#top .fancyborder_top{top:0; left:10px; height:10px; width:100%; right:auto; bottom:auto;}
#top .fancyborder_left{bottom:10px; left:0; height:100%; width:10px; right: auto; top: auto;}
#top .fancyborder_right{top:10px; right:0; height:100%; width:10px; left:auto; bottom:auto;}
#top .fancyborder_bottom{bottom:0; right:10px; height:10px; width:100%; top:auto; left:auto;}
Replace it with
/*Cleancut*/
#top .fancyborder{position: absolute; z-index:99; display:block; display:none;}
#top .fancyborder_top{top:0; left:10px; height:10px; width:100%; right:auto; bottom:auto; display:none;}
#top .fancyborder_left{bottom:10px; left:0; height:100%; width:10px; right: auto; top: auto; display:none;}
#top .fancyborder_right{top:10px; right:0; height:100%; width:10px; left:auto; bottom:auto; display:none;}
#top .fancyborder_bottom{bottom:0; right:10px; height:10px; width:100%; top:auto; left:auto; display:none;}
Regards,
Ismael