This looks to be an IE issue only with the INPUT tag.
Perhaps one way, if you know your way about, is to get the <INPUT /> after the <BR /> tag
like so...
<div id="wl_table"></div><br /><input type="hidden" name="mode" value="add" />
instead of it looking like this (the original code)...
<input type="hidden" name="mode" value="add" /><div id="wl_table"></div><br />
Quite why that worked for me I have no ideas - again, it appears only to affect IE :P
Hope this helps.
Regards,
Doms