Strange normal map behavior in viewport

Support Materials and Textures
1

My normal map is looking odd after closing and reopening my blend file. It looks fine when I first apply the material, but after closing, it comes back looking like this (right side).

http://s11.postimg.org/xb98pd19v/error.jpg

If I delete the material and reapply the normal map it looks fine, but again, it messes up after reopening the file.

2

Why no blend file and normal map supplied ?

3

Sorry. Actually I seem to have stumbled onto the reason, it was only doing this while using a 16-bit tiff. When I converted it to 8-bit it looked fine again.