Gap between header and forum

[psoexplorer]

There is a 1 pixel gap between the header and the actual forum. It's only in Internet Explorer, though - Firefox doesnt have this problem. The two attached images show the problem. The red arrows point to the gap, the first image is Internet explorer (with the gap) and the 2nd is Firefox (with no gap).

How can I get rid of this gap? I've made sure there are no gaps or spaces at the end of the header code, but here it is for you to look over:

<center><center>
<!-- ImageReady Slices (header2.psd) -->
<table id="Table_01" width="770" height="132" border="0" cellpadding="0" cellspacing="0">
	<tr>
		<td colspan="5">
			<img src="http://www.gamedreamz.com/forum/header/images/forumheader_01.png" width="770" height="70" alt=""></td>
	</tr>
	<tr>
		<td colspan="5" background="http://www.gamedreamz.com/forum/header/images/flashbg.png"><center><OBJECT classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
 codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0"
 WIDTH="746" HEIGHT="32" id="mainmenu" ALIGN="">
 <PARAM NAME=movie VALUE="http://www.gamedreamz.com/forum/header/flash/mainmenu.swf"> <PARAM NAME=quality VALUE=high><EMBED 

src="http://www.gamedreamz.com/forum/header/flash/mainmenu.swf" quality=high bgcolor=#656B61  WIDTH="746" HEIGHT="32" NAME="mainmenu" 

ALIGN=""
 TYPE="application/x-shockwave-flash" PLUGINSPAGE="http://www.macromedia.com/go/getflashplayer"></EMBED>
</OBJECT>
			</td>
	</tr>
	<tr>
		<td>
			<img src="http://www.gamedreamz.com/forum/header/images/forumheader_03.png" width="161" height="30" alt=""></td>
		<td>
			<img src="http://www.gamedreamz.com/forum/header/images/forumheader_04.png" width="161" height="30" alt=""></td>
		<td>
			<img src="http://www.gamedreamz.com/forum/header/images/forumheader_05.png" width="161" height="30" alt=""></td>
		<td>
			<img src="http://www.gamedreamz.com/forum/header/images/forumheader_06.png" width="160" height="30" alt=""></td><td><img src="http://www.gamedreamz.com/forum/header/images/forumheader_07.png" width="127" height="30" alt=""></td></tr><tr></tr></table><!-- End ImageReady Slices --><table border="0" width="$stylevar[outertablewidth]" cellpadding="0" cellspacing="0" align="center"><tr><td align="$stylevar[left]"><a href="$vboptions[forumhome].php?$session[sessionurl]"><img src="$stylevar[titleimage]" border="0" alt="$vboptions[bbtitle]" /></a></td></tr><tr><td align="center"><!-- content table -->$spacer_open
$_phpinclude_output

What other part of the code might cause this? It's been bugging me for weeks now.