I've just had a look at your textures Will, there very good, but I think you need to resize some of them.
Some are over 500 pixels wide and high and not square.
Patrick suggests they be 64x64 pixels, but if you make them any bigger they need to be in power of 2 format. That is 64x64, 128x128, 256x256. I don't think they need to be any bigger than that.
You may find they work for you in odd sizes, but a lot of us can't see them unless they are in power of 2 format and it would be a shame if we can't all see them, wouldn't it.
