Styling <th> in table not working in IE

[ChrisB]

I have a table that looks something like this\[code\]<table><tr> <th>Heading</th> <td>body</td></tr><tr> <th>Heading</th> <td>body</td></tr></table>\[/code\]Instead of having the heading float left by default. I want the to sit on top.Here is an example of my code - http://jsfiddle.net/PJQT8/1/