When you look in your code at the link that appear on the left hand side, you have the following types of code:
<td width="181" height="40"><a href="javascript:;">upcoming shows</a></td>
well... when you really do a href, you should make sure it isnt javascript, make sure it looks like a real addy:
<td width="181" height="40"><a href="forum/forummain.php">upcoming shows</a></td>
Using javascript is fine of course, however I am not sure why you would want to use it to call another page, unless it does so in a fancy manner... I could be wrong though.
As for W3C, see those little check taggy image thingies at the bottom of this forum page? Good stuff there...