I have reliability issues with Bitcoin Utopia. Running a 7950 I have hanging units on a nearly daily basis. It pays less for me than Collatz; about 500k vs 800k. It's a pretty big difference; I only intend to run BU to 25mil and then retire if the project doesn't stabilize. It used to run well on my 7790; now will not run at all.

I like the concept of BU, which is why I'm willing to put up with some of the headaches. Plus, when it shut down a few months back I was a few mil short of a good stopping point

I know some folks have had luck setting up BoincTasks to abort any work units that run longer than, say 500 or 600 seconds. I might take a run at this, I think it would greatly improve my production.