It invloves IE being in quirks mode (like dmitry said) and the box model
So it should actually be:
TD#content {
padding-left: 0px;
padding-right: 5px;
padding-top: 15px;
vertical-align: top;
width: 300px;
word-wrap: break-word;
overflow: hidden;
}
* html TD#content {
width: 305px; /* IE 5 */
w\idth: 300px; /* IE 6 */
}