I have these symbols showing at the top of my page in the Firefox browser.

They do not show up in Internet Explorer-
Please help me!! It is driving me crazy! Thanks to all in advance!!
Here's my code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" dir="ltr" lang="en">
<head>
<title>Zen Cart!, The Art of E-commerce</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<meta name="keywords" content="Hardware Software DVD Movies Gift Certificates Big Linked Test Examples Free Call Stuff Test 10% by Attrib Test 10% A Top Level Cat Sale Percentage Sale Deduction Sale New Price Big Unlinked New v1.2 Music Documents Mixed Product Types ecommerce, open source, shop, online shopping " />
<meta name="description" content="Zen Cart! : - Hardware Software DVD Movies Gift Certificates Big Linked Test Examples Free Call Stuff Test 10% by Attrib Test 10% A Top Level Cat Sale Percentage Sale Deduction Sale New Price Big Unlinked New v1.2 Music Documents Mixed Product Types ecommerce, open source, shop, online shopping" />
<meta http-equiv="imagetoolbar" content="no" />
<meta name="author" content="The Zen Cart™ Team and others" />
<meta name="generator" content="shopping cart program by Zen Cart™, http://www.zen-cart.com eCommerce" />
<link rel="stylesheet" type="text/css" href="includes/templates/classic/css/stylesheet.css" />
<link rel="stylesheet" type="text/css" href="includes/templates/classic/css/stylesheet_css_buttons.css" />
<link rel="stylesheet" type="text/css" media="print" href="includes/templates/classic/css/print_stylesheet.css" />
</head>
<body id="indexHomeBody">
<div id="mainWrapper">

<!--bof-header logo and navigation display-->
<div id="headerWrapper">
<!--bof-navigation display-->
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