Have you tried:
#leftcell
{
padding-right:0;
}
#rightcell
{
padding-let:0;
}
however you shouldn't be doing that anyway my friend, why make the server upload something when you don't have to? Just set the padding/margin properties correctly so it's how you want it.
Also make sure there are no borders:
border:0;
Also for the images if they are linked don't use
<img src="xxx" alt="xx" border="0" /> DO NOT USE BORDER = "0"
instead put this in your style sheet:
a img
{
border:0;
}
hope this helps