Sometimes you might have two cubes with one or more dimensions in common, but you don't necessarily have a virtual cube that joins the dimensions together. This situation might occur because the common dimensions aren't exactly the same, although...
table.downloadBox {
width: 100%;
border: solid 1px #666;
border-collapse: collapse;
}
table.downloadBox th {
background: #276C9F;
padding: 3px;
color: #fff;
font-size: 14px;
text-align: center;
}
...