Duplicate ID news.
<table id="news" class="bordercolor pad_4px cs_thin mar-bot;" style="table-layout:fixed">
and
<td class="small vtop"><div id="news"></div>
Invalid colspan: (multiple locations) -- For 2.6.2 and later only
1. near id="colnews", colspan="5"
2. twice near id="colgeneral", colspan="5"
3. twice near id="collounge", colspan="5"
4. twice near id="colsup1", colspan="5"
5. twice near id="colmods", colspan="5"
6. twice near id="coladmin1", colspan="5"
7. twice near id="colbugs", colspan="5"
Obviously the cell spanning 5 columns, but containing no visible data, should be split as 5 separate invisible cells to conform standard HTML5. This fights against the guideline I mentioned earlier that forbids empty cell contents, but there has to be at least one row with no columns spanning more than one cell.
With redesign could be replaced with simple div block if there is not enough information to fill all 5 columns.