Fixed width table cell expanding IE Bug

Description

The cells in an example containing digits have fixed width — 100 pixels. But IE somewhat expands some cells and ignoring its width. It seems this bug occurs when fixed-width columns somewhere are merged via colspan and one of that merged cells have undefined width.

Example

1 Root node
1 2 Child node 1
1 2 3 Child node 2
1 2 3 4 ...

Solution

There is currently no known solution. Does anyone know how to workaround this IE bug? Contact me.