EDIT: Just looked at supernova pool and someone pointed 350 (now) 550 MHash there (1/3 of the network more or less) but still did not find a block - you guys still think it is valid?
I think it's wrong, I don't like supernova for this reason.
Could you reject sgminer with high percent of errors only? I used it with mine-pool until March 7, and it had about 1% errors only.