Cycles baking : baked textures different from rendered textures

Good evening ! I’ve been playing with Cycles’ baking system today and had this very weird problem. I’ve modeled a couch and textured it. Then I baked the textures but the result is quite different from what my texture actually looks like. The baked texture has darker stripes and some artifacts whereas the rendered model has plain textures and seamless UVs.

Baked version (OpenGL render):

Rendered version :

I work with Blender 2.71 on a Windows 8 computer.

Thanks :slight_smile: