I\'m getting this too.  Up until recently I\'ve been running PS without CrystalSpace or CEL installed separately and it\'s been running fine.  Then, thinking that I might get a speed boost from a separately installed and possibly newer CS/CEL, I decided to install them based on a emerge command line I\'d seen before:

emerge jam cal3d ode lib3ds crystalspace cel

No problems at first, but after a reboot I was getting the same problems.  The sound also seemed to be running at half-speed.

After a quick bit of investigation, I\'ve found you can disable PS using an \"external\" version of CrystalSpace by running:

unset CRYSTAL
(the location of CrystalSpace is stored in $CRYSTAL)

Note that, unless you unmerge CrystalSpace completely, you\'ll need to unset the variable every time you reboot the computer, as it\'s set in a file located in /etc/env.d.

I\'m installing the CVS versions of CrystalSpace and CEL at the moment to see if they make any difference.  I\'ll keep you all posted.

Hope this helps!

UPDATE
It didn\'t make any difference.  Best thing, for the moment, is to unmerge CrystalSpace and CEL and let PlaneShift use its own built-in version of the libraries.

BTW the ebuild for the CVS version of CEL doesn\'t work -- it points to a non-existant CVS server.  I\'ve uploaded one that does work here just in case it\'s needed in the future.