Error found while checking this document as XHTML 1.0 Strict!

Result: 1 Error
:
: us-ascii
: XHTML 1.0 Strict
Root Element: html
Root Namespace: http://www.w3.org/1999/xhtml
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Validation Output: 1 Error

  1. Error Line 47, Column 17: ID "dso-navmenu" already defined 
            <ul id="dso-navmenu">

    ✉

    An "id" is a unique identifier. Each time this attribute is used in a document it must have a different value. If you are using this attribute as a hook for style sheets it may be more appropriate to use classes (which group elements) than id (which are used to identify exactly one element).

  2. Info Line 46, Column 16: ID "dso-navmenu" first defined here 
          <div id="dso-navmenu">

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