Parsing errors

"Ron Botterman" <[email protected]> Mon, 23 Jun 2014 16:20:46 +0200
Newsgroups gmane.org.w3c.validator.css
Message-ID <A62C18F000324A8DBACB76F9BE9CC235@ronHP>
Dear Sir(s),


My CSS is good but I still get warnings about “parsing errors”: (can’t find the warning message for vendor-extension). (http://www.tijluil.nl)

Example:
#header {
    display: block;
    height: 148px;
    width: 960px;
    border:8px solid #00ccff; 
    background-repeat:repeat;
    margin-bottom:6px;
    border-radius:20px 20px 20px 20px;
    -moz-box-shadow: -2px -2px 2px 2px #888;
    -webkit-box-shadow: -2px -2px 2px 2px#888;
    box-shadow: -2px -2px 2px 2px #888;
}

I want a shadow around my box(es), so how is there a way to avoid these warnings? It has to do with “dash” and “underscore”. Maybe I cannot avoid these warnings and have to accept them?

Greetings,

Met vriendelijke groet,

Ron Botterman
Watersnip 11
1191 TH Ouderkerk aan de Amstel