Validation at http://d-theme.com/cdmug highlighted some errors.

CSS 2.1 and CSS 3 validation both show the following errors.

URI : http://d-theme.com/sites/all/themes/cdmug/layout.css?n
287 #header, #content, #navbar, #sidebar-left, #sidebar-right, #footer, #closure-blocks Property word-wrap doesn't exist : break-word
URI : http://d-theme.com/sites/all/themes/cdmug/cdmug.css?n
355 .node-unpublished div.unpublished, .comment-unpublished div.unpublished Property word-wrap doesn't exist : break-word

The following XHTML has two errors, attribute names must be lower case and language is replaced by type.
<script LANGUAGE="JavaScript">