None of my settings have changed, but this is how my hashrate has been these past couple of days...

Notice the past two days... a bunch of rejects and lower speeds. Any reason why this is happening?
h2o has stated that all other servers besides the uswest/middlecoin.com server are still in beta and not 100% stable. While they may work most of the time, stuff like that can still happen.
edit: and because of these issues... which we still don't know what's causing them... our top miner (800mh/s) has left the pool. I'm sure many others have followed
I'm honestly glad that the chinese factory miner left. With a hashrate of 800MH/s you probably shouldn't be mining on a pool anyway.