Thought these might be interesting, too. From the startup messages in the console:

Game ready!
GetExecutableDirectory()
Error opening/creating file IgnoreShadeTables.txt: No such file or directory
IMAGE: Resource file FACES\114.sti does not exist
VOBJECT: Invalid image filename given (FACES\114.sti)
Error opening/creating file SPEECH\003_012.gap: No such file or directory

They don't appear to interfere with the game, at least not immediately. Again, path case and separator are wrong for Linux, but the files don't appear to exist anyway. Beginning to think something is wrong with my installation, so I'm going to try it again.