Below is what is creating the extra row... Make sure that it doesn't contain print-page buttons and anything else when you log in too. Also, the functionality of the login box within the snippet has disappeared so if you have replaced it to somewhere else then it should be safe to remove.
<table cellpadding="0" cellspacing="0" width="100%">
<tr>
<td class="HeadLine" align="right">
</td>
</tr>
<tr>
<td colspan="2" class="HeadLine">
<form action="/include/login.php" method="post" name="toploginform">
<input type="hidden" name="mode" value="logout" />
<input type="hidden" name="redirect" value="customer" />
<table cellpadding="0" cellspacing="0" width="100%">
<tr>
<td class="FLCAuthPreBox">
<img src="/skin1/images/spacer.gif" class="Spc" alt="" />
</td>
</tr>
</table>
</form>
</td>
</tr>
</table>