Your header code is not correct.
The right hand header does not fit properly at the end of the page for fluid style on wide screen settings.
You need to insert another data cell with a non breaking spacer in between the other two data cells in the header row.
Code:
<tr style="background: url(images/styles/generic_bluev1.0/misc/gb_header_02.gif);">
<td width="254" align="left">
<img src="/images/styles/generic_bluev1.0/misc/gb_header_01.gif" width="252" height="100" alt=" "></td>
<td> </td>
<td width="45" align="right">
<img src="/images/styles/generic_bluev1.0/misc/gb_header_04.gif" width="45" height="100" alt=""></td>
</tr>
That should fix it.