Hello Daimondrose, what you've got there looks like it might be a missing texture file, or a rendering error. Since you've mentioned this happening sporadically as opposed to constantly, I'm thinking it might be the latter.
Can you please go to your "C:\FeralHeart\media\textures\masks" folder and check if you have the following file: fheadShade.jpg ?
If you do, then could try switching your rendering subsystem in your ogre.cfg file? If you've got it set to OpenGL, then try switching it to Direct3D9—and vice versa—to see if that fixes things.