If I recall correctly, this is because the Faces servlet is mapped to /faces, and
installing the Faces scaffold into a sub-directory named 'faces', simply confuses
the Servlet and/or results in broken URLs being generated. The fix, if I'm not
mistaken, is to install the scaffold into a directory with a different name.
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Original post:
https://community.jboss.org/message/861628#861628