one thing you should try is<br />
<td width="50%" align="right"><img src="http://www.udtsealboard.com/ubbthreads/images/st5v1.gif" /></td>
<br /><br />You ususally get a little space if you dont have the end of the IMG tag right up against closing TD tag<br /><br />also, try that for any other images in the header