Hi,
You have something like the following in your theme:
[code:3gn5z5nw]<div id="navigation">
<div class="inside">
<ul class="left">
<?php suckerfish; ?>[/code:3gn5z5nw]
The #navigation seems to be messing things up badly and may be the #inside too, so try removing those. And you can’t have a UL wrapped around the suckerfish() function as you are then placing an unordered list within an unordered list without a list item – which is invalid code. So you will need to remove the wrapping UL or add a LI tag (usually best to just remove it).
However even after doing all of that, the menu is still looking rather odd. There is a conflict somewhere else in your CSS files, but I don’t have time to find it sorry. Also, did you modify the CSS after it was outputted from the generator? Even if I remove all of the other CSS files, the menu still looks odd as the line-height is very skinny.