[Resolvido] Validar css de thickbox

Gostaria de saber se alguém sabe como validar o arquivo css do thickbox, pois ele não é válido pelas normas WC3. Consegui fazer umas mudanças, mesmo assim, ficaram 4 erros. A seguir o código do arquivo modificado:

/ ----------------------------------------------------------------------------------------------------------------/
/ ---------->>> global settings needed for thickbox <<<-----------------------------------------------------------/
/ ----------------------------------------------------------------------------------------------------------------/
*{padding: 0; margin: 0;}
/ ----------------------------------------------------------------------------------------------------------------/
/ ---------->>> thickbox specific link and font settings <<<------------------------------------------------------/
/ ----------------------------------------------------------------------------------------------------------------/

#TB_window {
 font: 12px Arial, Helvetica, sans-serif;
 color: #333333;
}
#TB_secondLine {
 font: 10px Arial, Helvetica, sans-serif;
 color:#666666;
}

#TB_window a:link {color: #666666;}
#TB_window a:visited {color: #666666;}
#TB_window a:hover {color: #000;}
#TB_window a:active {color: #666666;}
#TB_window a:focus{color: #666666;}
/ ----------------------------------------------------------------------------------------------------------------/
/ ---------->>> thickbox settings <<<-----------------------------------------------------------------------------/
/ ----------------------------------------------------------------------------------------------------------------/

#TB_overlay {
 position: fixed;
 z-index:100;
 top: 0px;
 left: 0px;
 height:100%;
 width:100%;
}

.TB_overlayMacFFBGHack {background: url(macFFBgHack.png) repeat;}

.TB_overlayBG {
 background-color:#000;
}

html #TB_overlay { / ie6 hack */

 position: absolute;
 height: expression(fixHeight(document.body.scrollHeight, document.body.offsetHeight)); - ERRO
}
#TB_window {
 position: fixed;
 background: #ffffff;
 z-index: 102;
 color:#000000;
 display:none;
 border: 4px solid #525252;
 text-align:left;
 top:50%;
 left:50%;
}

html #TB_window { / ie6 hack */
position: absolute;
margin-top: expression(fixMarginTop(this.offsetHeight,document.documentElement,document.body.scrollTop)); - ERRO
}
#TB_window img#TB_Image {

 display:block;
 margin: 15px 0 0 15px;
 border-right: 1px solid #ccc;
 border-bottom: 1px solid #ccc;
 border-top: 1px solid #666;
 border-left: 1px solid #666;
}
#TB_caption{
 height:25px;
 padding:7px 30px 10px 25px;
 float:left;
}
#TB_closeWindow{
 height:25px;
 padding:11px 25px 10px 0;
 float:right;
}
#TB_closeAjaxWindow{
 padding:7px 10px 5px 0;
 margin-bottom:1px;
 text-align:right;
 float:right;
}
#TB_ajaxWindowTitle{
 float:left;
 padding:7px 0 5px 10px;
 margin-bottom:1px;
}
#TB_title{
 background-color:#e8e8e8;
 height:27px;
}
#TB_ajaxContent{
 clear:both;
 padding:2px 15px 15px 15px;
 overflow:auto;
 text-align:left;
 line-height:1.4em;
}

#TB_ajaxContent.TB_modal{

 padding:15px;
}

#TB_ajaxContent p{

 padding:5px 0px 5px 0px;
}
#TB_load{
 position: fixed;
 display:none;
 height:13px;
 width:208px;
 z-index:103;
 top: 50%;
 left: 50%;
 margin: -6px 0 0 -104px; /* -height/2 0 0 -width/2 */
}

html #TB_load { / ie6 hack */
position: absolute;
margin-top:expression(fixMarginTop(this.offsetHeight,document.documentElement,document.body.scrollTop)); - ERRO
}

#TB_HideSelect{
 z-index:99;
 position:fixed;
 top: 0;
 left: 0;
 background-color:#fff;
 border:none;
 height:100%;
 width:100%;
}

html #TB_HideSelect { / ie6 hack */

 position: absolute;
 height: expression(fixHeight(document.body.scrollHeight, document.body.offsetHeight)); - ERRO
}
#TB_iframeContent{
 clear:both;
 border:none;
 margin-bottom:-1px;
 margin-top:1px;
 margin-bottom:1px;
}

Desde já, agradeço pela ajuda.