CSS 2.1 errors: not a known property name

Here is my code, I got it from an AJAX sample:

body, div, p, h1, h2, h3, h4, ul, li, table
{
    margin:0;
    padding:0;
    border:none;
}

body
{
    background: #B4B4B4 url(images/body_bg.gif) repeat left top;    
    font-family: Tahoma, Arial, sans-serif;
    font-size:75%;
}

/* Master Page Layout */
#master_header
{
    margin: -1px auto 0 auto;
    width: 800px;
}

#master_headertop
{
    background: url(images/headertop_img.jpg) no-repeat left top;
}

#master_headerbottom
{
    background: url(images/headerbottom_img.png) no-repeat left top;
}

#master_page
{
    margin: 5px auto 20px auto;
    width: 800px;
}

#master_menu 
{
    float: left;
    width: 240px;
    padding-right: 10px;
}

.sidebar 
{
    width: 100%;
    margin-bottom: 10px;
}

.sidebarheader
{
    height: 24px;
    padding: 10px 0 0 35px;
    background: url(images/sidebar_header.png) no-repeat left top;
    color: #FFF;
    font-family: Arial, Sans-Serif;
    font-size: 1.2em;
    font-weight: bold;
    text-transform: uppercase;
}

.sidebarcontent
{   
    border: 1px solid #0F2543;
    padding: 20px 20px 20px 30px;
    line-height: 1.5em;
    font-weight: bold;
}

#master_sidebarSamples
{   
    padding-top: 72px;
    background: #FFF url(images/samples_bg.gif) no-repeat left top;
}

#master_sidebarWalkthroughs
{
    padding-top: 72px;
    background: #FFF url(images/walkthrough_bg.gif) no-repeat left top;
}

.sidebarcontent a
{
    padding: 2px 5px;
    color: #5377A9;
    text-decoration: none;
}

.sidebarcontent a:hover
{
    background-color: #0F2543;
    color: #FFF;
}

.sidebarcontent a:visited
{
    font-weight: normal;
}

#master_content
{
    float: left;
    width: 550px;
    margin-right: -550px;
    color: #666666;
}

/*
#master_content a
{
    color: #5377A9;
    padding: 1px;
}

#master_content a:link
{
}

#master_content a:visited
{
}

#master_content a:hover
{
    background-color: #BFBFBF;
    color:#FFF;
}
*/

#master_content ul
{
    margin: 0 25px