Edit: Title to reflect what I found out.  See last post.

I noticed a sharp drop in output from Cosmology, and it turns out that in my profile, the "On multiprocessors, use at most" setting got reset to 1, and it looks like some of the others on the team had the same drop, so check your profiles!

No, haven't touched anything.  Strange thing was it was set on the cosmo website, and all 4 boxes running cosmo did the same thing.  I tend not to set the local preferences as I like to be able to control them from my profiles.  Maybe it was one of the new projects I joined that did it.

Quote fron QCN front page. There is also alot of talk on the QNC boards.

"Please note that this software is best run as a single-processor job, so BOINC global prefs will be set to use 1 CPU, and only run when idle for 3 minutes. QCN is not a project you will want to run (especially in the alpha stage) alongside other BOINC projects"