So, I have two machines with dual 7970s. One crunches the new POEM stuff great, the other nothing but errors. The successful one is running 14.3 beta drivers. The other was 13.12, I think. Anyway, I did a scrubbed uninstall and then installed 14.3, and it is now crunching POEM successfully. No idea if that was just a coincidence or because of the driver upgrade. But for those with failing AMD tasks, try it.