Tabbing to a new cell is broken in IE9

Steps to reproduce:

• Goto the second-last cell (second from the right, in the last row) in a table
• Press Tab twice

Expected:
A new row of cells is created and the cursor moves to the first cell in the new row

Actual:
The entire table is selected

Nabeelah and I managed to fix the bug by placing a timeout of 0 around the cell selection code. But its obviously not an ideal solution, and it would be good to work out the real culprit.

var selectCell = function () {
    selection.select(cellNode, true);
    selection.collapse(true);
};

if (tinymce.isIE) {
    setTimeout(selectCell, 0);
} else {
    selectCell();
}