Different Simpsons hack.

I'm pretty sure this one strongly indicates the issue; the game uses a
very odd texture which between black and random (?) colors for even and
odd columns.  I'm not really an expert on how this stuff is supposed to
work, though.  And floating point on GPUs sucks.

Source/Core/VideoCommon/PixelShaderGen.cpp

@@ -757,7 +757,7 @@ static inline void WriteStage(T& out, pixel_shader_uid_data* uid_data, int n, AP
 		{
 			// calc tevcord
 			if (bHasTexCoord)
-				out.Write("\ttevcoord.xy = fixpoint_uv%d;\n", texcoord);
+				out.Write("\ttevcoord.xy = fixpoint_uv%d;tevcoord.xy -= int2(1,1);\n", texcoord);
 			else
 				out.Write("\ttevcoord.xy = int2(0, 0);\n");
 		}