Cycles material with bump and image texture - scale only the bump map? What I'm trying to achieve is a smaller/finer bump pattern in the material while the image should remain at its current size. I tried scaling the UV map but then the image texture is scaled the same way.

Or let me know if you have a good material setup for wallpaper that also allows for an image texture. 

Cheers!
You can use a Mapping node to adjust the scale of the texture. It would be placed between the connection of the Texture Coordinate node and the Image Texture node.