Hate to be the necrohippoflogaphiliac here, but I'm still getting really high rejects (even after the tweaks you did), also my hashrate is all over the place when I know my CGRemote is showing a cool 2.0 MHash.
Please take a look
http://www.clevermining.com/users/1M6ZozLvZoRhD6NLhtfcVB2aWcgtZhUG8w\Ideas? This is a rig I've mined with for months, and I've never had a high reject rate like this.
Pools "measure" hashrate via shares accepted. Accepted shares have variance, so your hashrate will flux. Doesn't appear your reject rate is all that different than the pool's. What is your avg reject % on cgminer?
Stales at 0.65% (about what I'd expect my total rejects to be)
Rejects 18.75%.
I almost never see my rejects below 10%, and they often spike to 25-30%.
Mind you I've only been mining this pool for about a day, but I'm really trying to give it a good run before making any long-term decisions. Just want to be sure I'm not bleeding shares.
Edit: I saw your twitter feed, I'm trying to lower my intensity slightly (as per someone's suggestion on there) to see if that helps. Bumping up from 19 to 20 was a change I made a few days ago, so I'll try at 19 and see if that helps at all.