i've found the solution for the problem of vertical shifting of the naviguation bar.
in screen.css, line 70, replace
`div#pagination ul{border:0; margin:10px 0; padding:0;list-style:none;}
div#pagination ul li{border:0;margin:0;padding:0;list-style:none;display:block;margin-right:2px;}
div#pagination ul a,div#pagination ul li.current span{border:solid 1px #F09018;margin-right:2px;
-moz-border-radius:3px;-khtml-border-radius:3px;-webkit-border-radius:3px;}
div#pagination ul .disabledlink{border:solid 1px #4A4A4A;display:block;float:left;font-weight:normal;margin-right:2px;padding:3px 4px;
-moz-border-radius:3px;-khtml-border-radius:3px;-webkit-border-radius:3px;}
div#pagination ul li.current a,div#pagination ul li.current span{background:#F09018;color:#FFFFFF;font-weight:bold;display:block;float:left;padding:3px 6px;}
div#pagination ul a:link,div#pagination ul a:visited{color:#F09018;display:block;float:left;padding:3px 6px;text-decoration:none;}
div#pagination ul a:hover{color:#fff;}
`
with
`div#pagination ul{border:0; margin:10px 0; padding:0;list-style:none;}
div#pagination ul li{border:0;margin:0;padding:0;list-style:none;display:block;margin-right:2px;float:left;}
div#pagination ul a,div#pagination ul li.current span{border:solid 1px #F09018;margin-right:2px;
-moz-border-radius:3px;-khtml-border-radius:3px;-webkit-border-radius:3px;}
div#pagination ul .disabledlink{border:solid 1px #4A4A4A;display:block;font-weight:normal;margin-right:2px;padding:3px 4px;
-moz-border-radius:3px;-khtml-border-radius:3px;-webkit-border-radius:3px;}
div#pagination ul li.current a,div#pagination ul li.current span{background:#F09018;color:#FFFFFF;font-weight:bold;display:block;padding:3px 6px;}
div#pagination ul a:link,div#pagination ul a:visited{color:#F09018;display:block;padding:3px 6px;text-decoration:none;}
div#pagination ul a:hover{color:#fff;}
`