[Lynne]

Add to css:
td.thead, th.thead, div.thead {
display: table-cell;
}

As for border, tborder isn't defined, so you'd need something like:
.tborder {
border: 1px solid black;
}

and then tcat has a border of a different color assigned, so you'll want the color of that border and the color of the tborder to be the same.

Everything looks just fine on the page if you just make those three changes.