Is a solo miner pretty much just a pool operator who has no users (other than himself / his botnet / his corporation / his CPU / his GPU / etc), or is there some further distinction between them that impacts such things as which version they "should" upgrade or downgrade to, or "would" tend to favour or risk favouring in the event of a fork?
(A pool operator might have more vested interest in not rocking some boat or other, maybe?)
-MarkM-
The way people are using "pool operator", I think so.
I like Hashers and Blockers. "Miners" refers to both
already, but a Hasher never assembles a block, and a Blocker rarely finds the solution, except in the case of solo miners, which have to be both.