11.7 WHQL fixes it too, but both 11.7 and 11.8 now trigger max cpu usage in *any* opencl app.
What I've found is that it
appears to use 100% CPU, but that processing time is not actually tied up. I can mine on two of my 6990s and play a very demanding game on the other one (which I assume is also using shit-tons of CPU power, and not experience any slowness from either application.
So, I think the 100% CPU problem shouldn't really be a consideration when choosing drivers... unless your experience had been different.