Hmmm...that's good to know, maybe it is some conflict with my specific mobo (AMD 890FX chipset) and card (5870). All I know is that 11.2 drivers made DNETC hang, but MW as stable. So I backed off to 10.12 and both run great.
11.3 drivers make DNETC hang and MW crunches a few WUs...then hangs. I only messed with it for 1/2 hour - nothing I did seemed to make much difference.
So I backed off to 10.12 again.
Interestingly enough, Kat's rig w/ 4870 is working perfect on 11.2 drivers, so...with your report in, maybe it's just my rig that has the problems?