so i've just completed 100,000 consecutive valid Milkyway@Home tasks! i don't know if it's all that noteworthy, but i'm sure thrilled about it. before i upgraded to Win7 x64, i was running on WinXP x32, and between the memory shortage issues and the inherent flaws in that OS, i never could run a multi-GPU host stably for more than a few days at a time...and so my runs of consecutive valid tasks never amounted to more than a few hundred to a few thousand tasks before an error or an invalid would ruin the streak.