Disable Mipmapping in 2.7

Since updating to 2.7 from 2.6, I am no longer able to disable mipmapping, and my textures are blurry. I’ve disabled Mipmaps and GPU Mipmap Generation in the user preferences, but it seems to do nothing.

I know it’s nothing to do with my actual textures, as they were working fine in 2.6.

(I am using the Game Engine here, but I don’t think that’s what’s causing the problem and so this shouldn’t be in that thread - let me know if I’m wrong…)