Hi burnside,
Looks like I have reproduced the issue with cpuminer on testnet. I will continue to look into the cause in the next few days and will update if I have more discoveries.
Awesome, thanks!
Hi burnside,
It seems that recent code in cpuminer broke something. When I switch to cpuminer v1.0.2 it appears to work fine. Which version of cpuminer were you using?
Yeah, I tried 2.2.1 and 2.2.3. Unfortunately 1.0.2 is about half as fast as the newer ones. I'll give it a try overnight anyway.

Any idea what would keep 2.2.x from working on PPC, when it works for BTC?