CSS & XHTML Validation Service errors

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Hi,

when i check CSS Validation Service i got three errors:

div#ccm-overlay Parse Error opacity=70)

div#ccm-overlay Property -moz-opacity doesn't exist : 0.7

div#ccm-overlay Property opacity doesn't exist in CSS level 2.1 but exists in [css3] : 0.7

URI :http://www.sitename.com/concrete/css/ccm.base.css...

XHTML validation

end tag for "ul" which is not finished .

<ul class="nav_root"></ul><div class="ccm-spacer">&nbsp;</div>

THX for reply