I'm going bananas here, somehow below all of my images in my page there is a gap, a margin which isn't there in the code. Even Firebug can't see it but Firefox and Safari are rendering it - EVEN WITHOUT CSS AT ALL!

This never happened to me before...!

<!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" xml:lang="en" lang="en">
<head>
    <meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>Paranoid</title>
<link rel="stylesheet" href="includes/style.css" type="text/css" />
</head>
<body>

    <div id="container">
        <div id="sidebar">
            <img src="images/logo.png" id="logo" />
            <ul id="menu">
                <li class="menu1">Main</li>
                <li class="menu1">System</li>
                <li class="menu1">View</li>
                <li class="menu1">Policy</li>
            </ul>
            <div id="sidebar_bottom"></div>
        </div>
        <div id="main_content"></div>
        <div class="clear"></div>
    </div>

</body>
</html>

body{
    background: #497e9f url(../images/bg.png) repeat-x top;
}
#container{
    width:864px;
    margin: 8px auto 0 auto;
}
#sidebar{
    /*width:139px;*/
    float: left;
}
#sidebar_bottom{
    height:10px;
    background: url(../images/sidebar_bottom_bg.png) bottom left no-repeat;
}
#sidebar #logo{
    margin-bottom: 2px;
}
#sidebar #menu{
    background: #f2f2f2;
    border: 0 1px solid #cecece;
    margin: 0;
    list-style: none;
}

                    
                    

                        
                        css
                        
                        image
                        
                        margin
                        
                    

                    

                        
                        
                        
                        
                        
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