will@will-desktop:~/Software/Blender$ sudo ./blender
guessing './blender' == '/home/will/Software/Blender/./blender'
Compiled with Python version 2.4.
Checking for installed Python... got it!
E: Make sure you set your CRYSTAL environment variable before loading blender.
Traceback (most recent call last):
  File "<string>", line 47, in ?
  File "/home/will/Software/Blender/.blender/scripts/bpymodules/b2cs/__init__.py", line 39, in ?
    import defaults
  File "/home/will/Software/Blender/.blender/scripts/bpymodules/b2cs/defaults.py", line 46, in ?
    b2cs.prop.walktest = b2cs.util.getSystemProgram("walktest")
  File "/home/will/Software/Blender/.blender/scripts/bpymodules/b2cs/util/pathhelper.py", line 49, in getSystemProgram
    if os.path.exists(os.path.join(path,program)):
  File "/usr/lib/python2.4/posixpath.py", line 62, in join
    elif path == '' or path.endswith('/'):
AttributeError: 'NoneType' object has no attribute 'endswith'