Terrain Texture Problem

I cause t$$anonymous$$s problem in some android device like samsun I9000. I set the texture size to a smaller size and put the camera into a very close distance. so, I get t$$anonymous$$s:

t$$anonymous$$s is my texture import setting:

I t$$anonymous$$nk terrain shaders was running error on those drives. because the splat1 like t$$anonymous$$s, and splat2 is normal. or some is wrong, the other is normal. why??

help!!!!!