I don't really know tech, but I see a lot of "ERROR: Couldn't load plugin with class ‘crystalspace.planeshift.spellchecker’!" showing up. That might have something to do with it.
Maybe if you check to see if that file is missing or if it's in the wrong location? Again, I'm not too familiar with sort of thing, so I'm afraid that's about the best advice I can currently give.
EDIT: Second thought, lots of things have errors in that terminal readout. Maybe more information would help. Did you just download PlaneShift or compile it or what? While I'm personally rather clueless here, I'm sure providing as many details as you can would help more tech-savvy forum critters help you figure this thing out.