0.6 is a bit more stable than 0.5 for me, but less so than 0.4.2. Having a lot of machines crash out on writing the Tahiti bin file - some of them do this over and over and then suddenly start mining for a while, others never start mining.

The 7 card Tahiti/Pitcairn/Hawaii rig continues to be a problem on anything but 0.4.2 - 0.5 and 0.6 both run to GPU driver failure and the machine must be rebooted at that point. 0.4.2 ran on that machine all day and night yesterday with only a 1000 second reset timer. Not getting max hashrates out of any one card on this machine. Currently trying 0.6 on it with the Hawaii cards on one instance and the rest on another instance. We'll see how this goes...