Oh well. I'll go back to 50btc and mine my regular 0.04 a day. The 10-50% extra I can make here just aren't worth being on call 24/7. It's a shame though, cause this has always been my first choice.
The bottom line is a business critical system, which this actually is, can not be this unstable. I'm a developer myself and I would be without work if I shipped applications with bugs of this magnitude. I'm not just talking about the last 24 hours, but the last month at least. As far as I know this is totally unprecedented in other pools, and we shouldn't be expected to put up with it.
My advice to you Slush is:
Take the pool offline and fix all problems with disappearing blocks and flucturing rewards. I'm sure you can do it again.