timber, it has to be forcefully a script that is calling that variable (in a improper way), since it's hardcoded.
so remove AssaultCube Home directory.
in linux: /home/Somebody/.assaultcube_v1.1
in windows if i remember correctly: go into documents and you'll find it.
some script is interfering, since installing it in a clean windows xp sp2 VM
it didnt give any of the errors you are describing.
edit.
if you cant solve it, come in IRC i'm there
so remove AssaultCube Home directory.
in linux: /home/Somebody/.assaultcube_v1.1
in windows if i remember correctly: go into documents and you'll find it.
some script is interfering, since installing it in a clean windows xp sp2 VM
it didnt give any of the errors you are describing.
edit.
if you cant solve it, come in IRC i'm there