Weird error in command line rendering

Read new prefs: /Users/inTheory/Library/Application Support/Blender/2.68/config/userpref.blendImportError: bad magic number in ‘site’: b’\x03\xf3
'found bundled python: /Applications/Blender/blender.app/Contents/MacOS/2.68/python

Any ideas? ​Use MacPro 2010, Nvidia 680 GT, Blender 2.68a