experimental package kind of broken.
According to post http://forums.plexapp.com/index.php/topic/35016-experimental-binary-packages/page__view__findpost__p__225113
There are missing symbols: ERROR: Unable to load /usr/local/lib/xbmc/system/players/dvdplayer/avcodec-52-x86_64-linux.so, reason: /usr/local/lib/xbmc/system/players/dvdplayer/avcodec-52-x86_64-linux.so: undefined symbol: NeAACDecClose
Thats AAC Decoder which iirc. (It's to early to for my brain) is done via external libary. For some reason it's not bind against this externel lib.
Some Problem and solution found here: http://forum.xbmc.org/showthread.php?t=41084
workaround: add export LD_PRELOAD="/usr/lib/libfaad.so" after export PLEX_HOME="/usr/local/share/xbmc" inside of /usr/local/bin/pmc
That was not sufficient for me on ubuntu 11.10. I had to add the following line:
export LD_PRELOAD="/usr/lib/libbz2.so:/usr/lib/libfaad.so"
Would be great if this were fixed.