Steve, Well, to me KPs almost always indicate hardware issues. Sounds like you have a couple of components you could try removing one at a time to help diagnose the problem. The memory issue you mention raises a red flag, you may want to start there, removing one at a time. USB2 also worth checking. What is the most recent hardware change that you made to the QS? Sounds like the CPU may be fine, given the solid performance you've had so far, but keep it in mind if you're not able to eliminate the KPs after checking other possibilities. Folding at home? In short, it's a distributed computing effort where folks allow their computers to crunch small packets of data when their machines are otherwise idle. When complete, the "calculation packet" is sent back to a server at Stanford Univ to add to their results on protein folding simulations. The project has produced many scientific papers that are helping to understand the folding of proteins, which is important in understanding and eventually curing a number of serious diseases (e.g., Alzheimers, various cancers). Lots of info on Stanford's site <http://www.stanford.edu/group/pandegroup/folding/>. If you're interested in contributing, be sure to check here <http:// teammacosx.homeunix.com/index.html>, where there is an active forum for Mac users participating in the project who can help you get set up and answer your questions. Very worthwhile cause, IMHO. Rick On Dec 14, 2006, at 5:18 PM, MegaSTMac at aol.com wrote: > What is folding at home? After I sent the e-mail about this, I > imported the > music with no problem. I left the computer on all night. (It > doesn't sleep, > probably cuz of the USB 2.0 card) Anyway, I think I'll wait to see > if this happens > again. So far the QS has been bulletproof since the Giga upgrade > before summer, > through about 35 cassette imports, until now, that is. The memory > issue does > give me pause, as I got conflicting reports from different ram testing > programs I ram not long after I bought the machine. > > For now, I'll see if I have more episodes like last night, in the > future.I > assume that more will come if there is a real problem.