Código:

.cont_code{margin: -20px -4px -4px !important;color:#DFC484;background:#000000 !important;max-height: 500px !important;padding:22px 10px 10px !important;

Erro detectado
Nós contamos um número diferente de "{" e de "}". Isto significa que o seu CSS pode não ser válido e não será exibido corretamente no seu fórum.

Lhe aconselhamos que releia o seu código.

Código:

.cont_code{margin: -20px -4px -4px !important;color:#DFC484;background:#000000 !important;max-height: 500px !important;padding:22px 10px 10px !important;}

Código:

.cont_code code {display: block!important;max-width: 600px;white-space: pre-wrap;word-wrap: break-word;}
.cont_code {-moz-border-radius: 8px;-webkit-border-radius: 8px;background: #333!important;border-radius: 8px;color: #DFC484;font-size: 11px;line-height: 1.8;margin: -20px -4px -4px!important;max-height: 500px!important;padding: 22px 10px 10px!important;}
dl.codebox dt {background: url(http://i42.servimg.com/u/f42/17/32/13/00/downcr11.png) no-repeat 0 0;border: 0;color: #0072FF;padding: 0 0 0 15px;position: relative;}
.codebox dt {border-bottom: 1px dotted #CCC;}
.postmain .postbody .post-entry dl.codebox {width: 90%!important;}
dl.codebox {background: none;background-image: url(http://i26.servimg.com/u/f26/14/56/85/28/novida10.png);border: 1px solid #C9D2D8;margin: 0;max-width: 900px!important;padding: 3px;}
.codebox {-moz-border-radius: 6px;-webkit-border-radius: 6px;border-radius: 6px;}

Código:

function selectCode(a){var e=a.parentNode.parentNode.getElementsByTagName('CODE')[0];if(window.getSelection){var s=window.getSelection();if(s.setBaseAndExtent){s.setBaseAndExtent(e,0,e,e.innerText.length-1)}else{if(window.opera&&e.innerHTML.substring(e.innerHTML.length-4)=='<BR>'){e.innerHTML=e.innerHTML+' '}var r=document.createRange();r.selectNodeContents(e);s.removeAllRanges();s.addRange(r)}}else if(document.getSelection){var s=document.getSelection();var r=document.createRange();r.selectNodeContents(e);s.removeAllRanges();s.addRange(r)}else if(document.selection){var r=document.body.createTextRange();r.moveToElementText(e);r.select()}};jQuery(document).ready(function(){jQuery("dl.codebox dt").not("dl.spoiler > dt").html('Código: <a href="#" onclick="selectCode(this);return false">                                                                Selecionar Tudo</a>')});

Código:

<script>function selectCode(a)
{
 // Get ID of code block
 var e = a.parentNode.parentNode.getElementsByTagName('CODE')[0];
 // Not IE
 if (window.getSelection)
 {
 var s = window.getSelection();
 // Safari
 if (s.setBaseAndExtent)
 {
 s.setBaseAndExtent(e, 0, e, e.innerText.length - 1);
 }
 // Firefox and Opera
 else
 {
 // workaround for bug # 42885
 if (window.opera && e.innerHTML.substring(e.innerHTML.length - 4) == '<BR>')
 {
 e.innerHTML = e.innerHTML + ' ';
 }
 var r = document.createRange();
 r.selectNodeContents(e);
 s.removeAllRanges();
 s.addRange(r);
 }
 }
 // Some older browsers
 else if (document.getSelection)
 {
 var s = document.getSelection();
 var r = document.createRange();
 r.selectNodeContents(e);
 s.removeAllRanges();
 s.addRange(r);
 }
 // IE
 else if (document.selection)
 {
 var r = document.body.createTextRange();
 r.moveToElementText(e);
 r.select();
 }
}
if(text){}else{ var text = 'Selecionar todos';}
jQuery(document).ready(function(){
 jQuery("dl.codebox dt").not("dl.spoiler > dt").html('Código: <a href="#" onclick="selectCode(this); return false;"><font face="verdana" color="white">--------------------------------------------------------------------------------------------</font>Selecionar conteúdo</a>');
});
</script>