I posted this in the maya forum but thought I would get more help here.
So here is may problem, I did a normal map in mudbox 2009 and in maya there are seams at some UV intersections. The normal map is seamless and was edited in photoshop to be sure, it was then renormalise withe the Nvidia plugIn.
Thanks everyone for your help. Wayne, I tried the photoshop tip and it didn’t work but I changed my lights placements and there is no apparent seam now. So can someone explain me why this happened and how to avoid it?