I had a very strange issue with a DVD (others worked) that reported it could not find a codec and bugged out. (AFD Error: Could not find codec parameters. file was....)
Looking at the codecs being pulled in by "Fetch and Save Codecs" from myplayer.hu, it is a stable 2007 version, so I manually pulled down http://www.mplayerhq.hu/MPlayer/release ... 31.tar.bz2 created a squashsfs into conf-rw and it worked.
Perhaps a newer version of codecs can be put into testing releases?