@Schmiddie: Could you take a look?
(I think somewhere we already had a similar report like that in the past.)
I have checked the graphic files and could not reproduce it ingame. All graphics worked very well. Very strange...For the moment there is nothing that can be done without great efforts. However, due to the intended overhaul we may change some graphics and other might be newly built up from the scratch. I will keep this bug in mind. In any case the bug would be fixed when the gaphic is completely new built in Blender.