If you just have a small glitch between resolutions you can use a small piece of javascript to tell the browser to either put one line of code or the other.
The example here is to test if the browser is IE or Netscape and to put in code accordingly. Your other code goes around it.
code:
<SCRIPT LANGUAGE="JavaScript">
// Begin
if (navigator.appName == "Microsoft Internet Explorer")
{
document.write('<TR><TD height=7><IMG SRC="images/spacer.gif" height=7></TD></TR>')
}
else
{
document.write('<TR><TD height=10><IMG SRC="images/spacer.gif" height=7></TD></TR>')
}
// End -->
</SCRIPT>