Check the footer, which is wider than the navbar. It begins with the following:
Code:
<table cellpadding="$stylevar[cellpadding]" cellspacing="0" border="0" width="$stylevar[outertablewidth]" class="page" align="center">
The navbar begins:
Code:
<table class="tborder" cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" border="0" width="100%" align="center">
I'm no expert but this looks like the difference. Note the difference between the width specs.