header disappears in firefox?

everything else seems to look okay in FF, but the header just doesn't show. i don't know if this is a stylesheet issue or what. here is the URL: http://www.overspeedmotorsports.com/

Just remove those comments and everything would be fine

AND

These comments are actually making the whole header section also commented
See this link as to why this comment here is wrong
http://www.htmlhelp.com/reference/wilbur/misc/comment.html

You final final should be this:
(just check the first and last part and replace)

<TABLE class=centershop cellSpacing=0 cellPadding=0 border=0>
  <TBODY>
  <TR>
    <TD>
      <TABLE class=header cellSpacing=0 cellPadding=0 width=744 border=0>
        <TBODY>
        <TR>
          <TD width=744>
            <TABLE id=Table_01 height=182 cellSpacing=0 cellPadding=0 width=744
            border=0>
              <TBODY>
              <TR>
                <TD rowSpan=3><IMG height=182 alt=""
                  src="Overspeed Motorsports, Your online source for the hottest performance parts!_files/header_01.jpg"
                  width=309></TD>
                <TD rowSpan=3><IMG height=182 alt=""
                  src="Overspeed Motorsports, Your online source for the hottest performance parts!_files/header_02.jpg"
                  width=254></TD>
                <TD colSpan=2><IMG height=131 alt=""
                  src="Overspeed Motorsports, Your online source for the hottest performance parts!_files/header_03.jpg"
                  width=181></TD></TR>
              <TR>
                <TD width=134
                background="Overspeed Motorsports, Your online source for the hottest performance parts!_files/header_04.jpg"
                height=30><INPUT size=18 name=textfield3></TD>
                <TD><IMG height=30 alt=""
                  src="Overspeed Motorsports, Your online source for the hottest performance parts!_files/header_05.jpg"
                  width=47></TD></TR>
              <TR>
                <TD colSpan=2><IMG height=21 alt=""
                  src="Overspeed Motorsports, Your online source for the hottest performance parts!_files/header_06.jpg"
                  width=181></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
      <TABLE class=main_page cellSpacing=0 cellPadding=0 border=0>
        <TBODY>

You will have to provide additional detail as to how, & where you have entered the head image. Post the code & file that you have altered.

Second; you are using an older version of zencart you should seriously consider an upgrade to the latest version.

Third; Your site loads very slow...and I am currently on a T1 link. Your thumbnail images are averaging 150K each and for the size of the displayed image, a file of less than 5k would provide the detail required.

What version of Zen Cart are you using? Was this an upgrade?

When your comments says:

That means !- is the start of the comment
Now there are two such !- in the same line and therefore parser thinks till it gets a "->" all lines are comments

This is a typical problem with the hitechpc template contribution and others based on it.

Simply remove the comment lines and things should return to normal.

i took out the extra !!! and it's still doing it.

im running v 1.2.4d

Can you try removing these lines?

AND

that did it thanks!