What are you doing?
You are on this page:
http://www.sporadicthoughts.com/
and just want to lose the top right of the nav bar where you have a search box?
Just delete the following:
<form action="/index.php" method="get">
<fieldset>
<input value="" name="s" id="s" />
<input type="submit" value="Go!" id="searchbutton" name="searchbutton" />
</fieldset>
</form>
And it works fine for me in ie6 and firefox.
If I am missing your point clarify for me.
Where do you remove that line? I don’t see it.