Quote: "o_O I don't have that bug..."
Puffy, try making a texture where one half is light blue and the other half is bright pink. prepare matrix texture to divide it into 2 tiles then texture your matrix with the blue half.
Set your camera so that its close to the matrix and looking a long the matrix. You should see a hiddeous pink bleed through in the distance. Well, technically you shouldnt... but you do.
Thats the bleed through that Sonic is refering to. Its not always visible if the matrix tiles from the texture image have similar colours.