It seems to work one some updated versions of windows 8, and be completely broken on others. There was an update a bit ago that fixed an issue with bluetooth causing a UI freeze in the metro UI, and that update had caused the issue with the shadercache to start for me. Once the next update rolled out, Dolphin started working properly again, and I haven't updated since, so they could've broken it again.
in a perfect world we would all be piles of sand with no ability to form coherent bodies of body