Is your BTC/MH calculated on accepted share megahash or accepted + rejected share hash rate?
It's based on accepted shares. I know it's not perfect, but I think it doesn't make sense to base it on accepted+rejected as some malicious traffic flooding with invalid shares might easily skew the numbers. It can't do it when the stats are based on accepted hasrate.
This is interesting, it should probably be noted somewhere because those users with 5-10% rejects will be getting that much less of the estimated daily earnings and probably say wtf