I've checked this in the css validator ,passed ok but some warnings
URI :
http://www.virtualchill.com/index.php?action=forum;theme=4Line : 83 (Level : 2) Redefinition of margin-top : #autoXML22652102265210
URI :
http://www.virtualchill.com/Themes/SimplyWhite1/style.css?beta3Line : 3 (Level : 1) You have no color with your background-color : .board_rules
Line : 12 (Level : 1) You have no background-color with your color : a:visited
Line : 12 (Level : 1) You have no background-color with your color : a:visited
Line : 17 (Level : 1) Same colors for color and background-color in two contexts .button:hover and a:hover
Line : 17 (Level : 1) You have no background-color with your color : a:hover
Line : 24 (Level : 1) You have no background-color with your color : .nav:visited
Line : 24 (Level : 1) You have no background-color with your color : .nav:visited
Line : 24 (Level : 1) You have no background-color with your color : .nav:visited
Line : 30 (Level : 1) You have no background-color with your color : a.nav:hover
Line : 30 (Level : 1) Same colors for color and background-color in two contexts .button:hover and a.nav:hover
Line : 43 (Level : 1) You have no background-color with your color : td
Line : 60 (Level : 1) You have no background-color with your color : button
Line : 60 (Level : 1) You have no background-color with your color : button
Line : 60 (Level : 1) You have no background-color with your color : button
Line : 75 (Level : 1) You have no background-color with your color : select
Line : 85 (Level : 1) Same colors for background-color and color : .hrcolor
Line : 85 (Level : 1) Same colors for background-color and color : .hrcolor
Line : 117 (Level : 1) You have no background-color with your color : .codeheader
Line : 117 (Level : 1) You have no background-color with your color : .codeheader
Line : 133 (Level : 1) You have no background-color with your color : .meaction
Line : 176 (Level : 1) You have no background-color with your color : .titlebg a:hover
Line : 176 (Level : 1) Same colors for color and background-color in two contexts .button:hover and .titlebg a:hover
Line : 197 (Level : 1) You have no color with your background-color : .bordercolor
Line : 204 (Level : 1) You have no color with your background-color : .tborder
Line : 226 (Level : 1) You have no color with your background-color : #headerarea
Line : 236 (Level : 1) You have no background-color with your color : .sep
Line : 236 (Level : 1) Same colors for color and background-color in two contexts .catbg2 and .sep
Line : 236 (Level : 1) Same colors for color and background-color in two contexts .catbg and .sep
Line : 242 (Level : 1) You have no color with your background-color : #bodyarea
Line : 262 (Level : 1) You have no color with your background-color : .headerbodies
Line : 276 (Level : 1) You have no color with your background-color : .forumnews
Line : 358 (Level : 1) You have no color with your background-color : .no_new_posts:hover
Line : 358 (Level : 1) You have no color with your background-color : .no_new_posts:hover
Line : 358 (Level : 1) You have no color with your background-color : .no_new_posts:hover
Line : 403 (Level : 1) You have no color with your background-color : .newsinfo