David -
The only thing I can see is a bit of whitespace under the navigation buttons. You could add a filler list element at the end of your list to make the UL expand to the same "height" as the navigation LI's (as they are floated left they are out of the flow causing the UL to resize to 0 height.)
eg
<ul id="menu">
<li class="topnav187"><a href="display.asp?entityid=187">Company Profile</a></li>
<li class="filler> </li>
</ul>
css on the #menu .filler could include float:none; to place the element back in the page flow.
The .filler could be the light green blank bit to the right of the nav. Your UL bgcolor could then be the light green you currently have.
Also not sure why you are using fixed widths on the LI - padding would be better for this? Then you wouldn't have to set individual classes for each LI element.
HTH James
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