So I have been working on a sword and hit a roadblock once I started texturing it. I applied the texture and linked it to a Mapping Node but the Scale, Rotation and Location sliders do NOTHING. The only thing that actually changes the texture is scaling the UV beyond the UV grid but I discovered that this causes horrific problems when texture painting. I doesn't work in any mode.
Here is an image:
And here is the .blend file if you want to inspect it closer. If you want, you can also check for other problems.