I bought a 2015 rMBP a few weeks ago (2.5 GHz 15" with the AMD R9 GPU). Sometimes when the graphics card switches between integrated and the discrete, the mouse or cursor gets pixellated and will remain that way until I switch to a different window than the one I am currently in and switch back to it. This happens regardless of programs used or power status (battery or AC power). Has anyone else experienced this? It seems like a software issue, but I am not sure. There is no Apple Store near me, unfortunately.