Nurbs texture seam

Hi all,

I am relatively knew to all of this so I'm sure there is something very simple I'm overlooking but here goes.
I follwed the making Earth tutorial and it came out looking very nice with one exception. There is a seam just off the coast of New Zealand.
I have looked at the texture in photoshop and I can't see a seam. I have adjusted the teselation all to no avail.
Any suggestions?
The texture I'm using can be found at
http://www.oera.net/How2/TextureMaps.htm