When running the default beta4 install through the w3c css validator the following errors occure:
URI :
http://www.novion.net/tests/cmsms10beta ... ype=screen
Line: 252 Context : code, pre
Invalid number : white-space pre-wrap is not a white-space value : pre-wrap
Line: 253 Context : code, pre
Invalid number : white-space Parse Error - -moz-pre-wrap
Line: 254 Context : code, pre
Invalid number : white-space Parse Error - -pre-wrap
Line: 255 Context : code, pre
Invalid number : white-space Parse Error - -o-pre-wrap
Line: 256 Context : code, pre
Property word-wrap doesn't exist : break-word
Line: 436 Context : div#menu_vert a
Invalid number : background Too many values or values are not recognized : url(images/cms/arrow-right.gif) no-repeat 0.5em center
Line: 444 Context : div#menu_vert ul ul a
Invalid number : background-position 1.5em and center are incompatible : 1.5em center
Line: 450 Context : div#menu_vert ul ul ul a
Invalid number : background Too many values or values are not recognized : url(images/cms/dash.gif) no-repeat 2.8em center
Line: 467 Context : div#menu_vert li a.activeparent
Invalid number : background Too many values or values are not recognized : url(images/cms/arrow-down.gif) no-repeat 0.4em center
Line: 473 Context : div#menu_vert ul ul li a.activeparent
Invalid number : background-position 1.5em and center are incompatible : 1.5em center
Line: 484 Context : div#menu_vert ul h3
Invalid number : background Too many values or values are not recognized : url(images/cms/arrow-right-active.gif) no-repeat 0.4em center
Line: 500 Context : div#menu_vert ul ul h3
Invalid number : background-position 1.4em and center are incompatible : 1.4em center
Line: 509 Context : div#menu_vert ul ul ul h3
Invalid number : background Too many values or values are not recognized : url(images/cms/arrow-right-active.gif) no-repeat 2.7em center
Line: 631 Context : * html > body .clearfix
Invalid number : display inline-block is not a display value : inline-block
btw xhtml checks out as valid