That's what I first thought, but running the game through the terminal gives a weird message at the end:
CreateTexture ./guiborder2.tga alpha 6
N?got gick fel!
myloadmalloc: can't open ./guiborder2.tga
N?got gick fel!
myloadmalloc: can't open ./guiborder2.tga
flushopengl
mem ok
DeinitPrint
Abort trap