Thank you for that, saved me (and I'm sure others) a lot of potential hassle.

The new Z kernel has taken my pair of 780s from circa 500 khash each to circa 600 - quite a bump!

I did notice that they are using even more CPU now though - at 500 khash each I was able to run a single thread of either Prime or Particle (on my 2600K running at 4.5GHz) without slowing down the GPU mining, but now even a single thread of CPU mining kills the GPU speed.

Thanks again to all involved!