I fixed the <h3> tags as you said. I'll be working on this all night so feel free to post your suggestions. Thanks again! I appreciate the effort you probably put in 'all night'. However, I changed most of your code and made the CSS be 'internal' (your external file is not needed).
I would make this internal CSS be 'external' when you have it the way you want it (some link colors are probably not the way you want anymore).
I have got this looking the same in IE6 and Fx 2.x, no errors or warnings on TIDY.
I created a dummy-image (attached) to populate the #header requirements for a representative image.
Enjoy!
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<!-- link type="text/css" rel="stylesheet" href="/bbq.css" / -->
<title>
"Virginia-style" BBQ Sauce! Welcome!
</title>
<!-- Note: Above on TITLE, I changed word "Welcome!" to be the LAST word. NEVER start "TITLE"-tag with "THE", or "WELCOME", etc...
This is for SEO purposes. You want site to be ranked by it's actual NAME, not by "WELCOME to my~..." -->
<style type="text/css">
/* Content Properties */
* {margin:0; padding:0; }/* 'zero' everything first for cross-browser */
body {background-color:#b5a789; color:black; font-family:tahoma, sans-serif;
font-size:11px; text-decoration:none; line-height:14px;}
html, body {height:100%;}
p {font-family: tahoma, sans-serif; font-size: 13px; color: #6e4835; }
.red { color: red; }
#wrapper {position:relative; width:800px; height:auto; padding:10px; margin:10px auto 20px auto; background-color:#efe5d0;}/* basic */
#wrapper {min-height:100%; overflow:hidden;} /* 100% height for compliants, enwraps content*/
* html #wrapper {height:auto;}/* and feed IE what it needs */
#header {position:relative; background-color:#675c47; height: 88px; width:auto; border:1px solid red;}
#menu {position:relative; left:25px; width:470px; height:17px; margin:40px auto 0 auto; padding:2px 0 2px;text-align:center; background-color:#efe5d0;;}
#menu li {display:inline; width:60px; padding:0 10px 0;}
#menu li a {width:60px; padding:1px 7px 1px;}
#menu li a:hover {background-color:wheat;}
#leftContent {width:440px; float:left;}
#main {background-color:#efe5d0; font-size:1.0em; padding:20px 15px 15px;; margin:10px auto;
font-family: tahoma, sans-serif; color:#6e4835; text-decoration:none; overflow:hidden;
line-height:normal; width:744px; height:100%; height:auto; border:12px solid #675c47;}
/*
#contact { background-color:#efe5d0;text-align: left; font-size:1.0em; padding:15px;
margin:0px 10px 10px 10px; float: left;}
*/
#rightContent {background:#efe5d0; text-align:left; border-left:10px solid #675c47;
padding:15px 15px 15px 25px; margin:0px 10px 10px 10px; float:right; width:182px;}
#footer {background-color:#675c47; color:white;
text-align: center; padding:15px; font-size:90%; clear:both;}
#footer p { color:white;}
h1, h2, h3, h4, h5, h6 {font-size:0; font-family: 'times new roman', arial, verdana, helvetica,
sans-serif; background-color:none;font-style:normal; font-variant:normal;
font-weight:bold; margin:14px 0 4px 10px; padding:3px;}
h1 {font-size: 1.60em; color: #954b4b; border:1px dashed #954b4b;}
h2 {font-size: 1.50em;}
h3 {font-size: 1.40em;}
h4 {font-size: 1.30em;}
h5 {font-size: 1.26em;}
h6 {font-size: 1.20em;}/* Defined default Header sizes*/
/* Navigation */
a {color:black;}
a:link {color:black; text-decoration:none; font-size:12px; font-weight:bold;}
a:visited {color:green;}
a:hover {color:blue; text-decoration: underline;}
a:focus {color:blue;text-decoration: underline;}/* a 'hover state' for non-mouse navigation, like 'hotkeys' for handicapped, etc */
a:active {}/* for depressed 'mouse-down' button state */
</style>
</head>
<body>
<div id="wrapper">
<div id="header">
<img src="va-sauce.gif" alt="replace this ketchup bottle image with YOUR image..." title="replace this ketchup bottle image with YOUR image..." style="position:absolute; left:20px; top:-12px;" />
<ul id="menu">
<li><a href="index.html" title="Back to the Home Page">Home</a></li>
<li><a href="about.html" title="Read about how we started">Our Story</a></li>
<li><a href="order.html" title="Click to order our sauces!">Ordering</a></li>
<li><a href="fundraising.html" title="We can suit your fundraising needs">Fundraising</a></li>
<li><a href="contact.html" title="How to get in touch with us">Contact</a></li>
</ul>
</div><!-- end HEADER -->
<div id="main">
<div id="leftContent">
<h1 title="Welcome to "Virginia-style" BBQ Sauce!">Welcome to "Virginia-style" BBQ Sauce!</h1>
<h4 title="ADD the text of this HEADER tag, for Accessibility and indexing">THIS SITE IS IN THE MIDDLE OF CONSTRUCTION. <br />
PLEASE BE PATIENT WHILE WE ADD THE FINISHING TOUCHES. THANK YOU.</h4>
<h5 title='"Virginia-style BBQ Sauce": -Youre in for a real treat!'>You're in for a real treat!</h5>
<p>Our sauce is specially formulated to offer you the best possible taste. It's a one-of-a-kind blend that's not too mild and not too <span class="red">spicy.</span></p>
<p>Try our sauce once, and you'll be a customer for life!</p>
<p>If you're not 100% satisfied, send back the unused portion and we'll gladly refund your money (excluding shipping).</p>
<p><a href="about.html" title='Read about "Virginia-style BBQ Sauce" and our other sauces'>Learn more</a> about our product.</p>
</div><!-- end leftContent -->
<div id="rightContent">
<h2 title="Look for VA-Style BBQ Sauce in stores!">Look for VA-Style BBQ Sauce in stores!</h2>
<p>Our sauces can be found in Kroger Supermarkets, Food Lion, & other local retailers.</p>
<h3 title="Unique Fundraising Opportunity">Unique Fundraising Opportunity</h3>
<p>Instead of settling for candy, popcorn or gift wrap as a fundraising item, why not consider purchasing VA Style BBQ sauce?
Our sauces are available in four flavors, easy to sell, and will make an excellent profit. <a href="fundraising.html" title="Click to learn more">More...</a></p>
</div><!-- end SIDEBAR -->
</div><!-- end MAIN -->
<div id="footer">
<p title="© 2007 TLT Enterprises. All Rights Reserved.">© 2007 TLT Enterprises. All Rights Reserved.</p>
</div><!-- end FOOTER -->
</div><!-- end WRAPPER -->
</body>
</html>