Non power of Two Textures

I’m using some non-power-of-two textures in my app.
Something strange happens in Nsight though.
In API Inspector I can see my texture and all its mipmaping level correctly (generated with glGenerateMipmap)
But in the Resources Window/Graphical, it is all messed up.
Same thing in the graphics HUD, the texture is completely wrong, and sometimes completely black.
My app is displaying correct textured objects though.
Any idea ?..