If a system can overheat under anything but extreme circumstances (really high ambient temperature) then is it really 'working perfectly'?
If your system has the potential to overheat when running any distributed client, then it also has the potential to overheat when running ANY game or other intensive program and is overclocked past a reasonable point for that particular CPU and cooling system. If your computer is overclocked enough that a DC client reveals problems that have not been experienced before, then you are not using the benefits of that overclocking in your regular use, and really don't have any reason to be doing the overclocking other than just to say that you did it...
Sorry, just playing devil's advocate here. (Gotta release those work-related frustrations somehow..)
