prettyfaces team (Lincoln Baxter etc.) have punted this problem over to see if the Weld guys can have a butchers and perhaps solve the problem...
http://ocpsoft.com/support/topic/prettyfaces-cdi-and-the-case-of-the-missing-cidxxx/page/2?replies=32#post-2681
and...
http://forum.primefaces.org/viewtopic.php?f=3&t=17995&p=55784#p55784
