Naturally, I found some. The first one looks like a real typo. The other two are // comment-outs. I'm guessing that's not the recommended comment method for style sheets?
Warning: Expected ':' but found '.'. Declaration dropped.
Source File: http://forums.beastlords.org/Themes/amber11rc2/style.css?rc2
Line: 96
Warning: Expected declaration but found '/'. Skipped to next declaration.
Source File: http://forums.beastlords.org/Themes/amber11rc2/style.css?rc2
Line: 53
Warning: Expected declaration but found '/'. Skipped to next declaration.
Source File: http://forums.beastlords.org/Themes/amber11rc2/style.css?rc2
Line: 59