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HTML

<body>
    <p>
        The following pre tag containst the errors generated by this very page as they are desplayed in Opera's Dragonfly console.
    </p>
  <pre>
Unknown pseudo class
  *,:x
  ----^	HTML style attribute	HTML style attribute:1
		-moz-box-sizing is an unknown property
  box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;p
  --------------------------------------^	HTML style attribute	_display/:1
		-webkit-box-sizing is an unknown property
  box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;p
  --------------------------------------------------------------------^	HTML style attribute	_display/:1
		-moz-box-sizing is an unknown property
  adding:0;margin:0;border:0;display:block;box-sizing:content-box;-moz-box-sizing:
  --------------------------------------------------------------------------------^	HTML style attribute	_display/:1
		-webkit-box-sizing is an unknown property
  lay:block;box-sizing:content-box;-moz-box-sizing:content-box;-webkit-box-sizing:
  --------------------------------------------------------------------------------^	HTML style attribute	_display/:1
		-moz-box-sizing is an unknown property
  adding:0;margin:0;border:0;display:block;box-sizing:content-box;-moz-box-sizing:
  --------------------------------------------------------------------------------^	HTML style attribute	_display/:1
		-webkit-box-sizing is an unknown property
  lay:block;box-sizing:content-box;-moz-box-sizing:content-box;-webkit-box-sizing:
  --------------------------------------------------------------------------------^	HTML style attribute	_display/:1
		-moz-box-sizing is an unknown property
  adding:0;margin:0;border:0;display:block;box-sizing:content-box;-moz-box-sizing:
  --------------------------------------------------------------------------------^	HTML style attribute	_display/:1
		-webkit-box-sizing is an unknown property
 ...