Jim, You are describing symptoms that are happening to me. However I thought it was my old G4-400mhz Gigabit. Now I feel that it is probably OS-X.4.7. I am wondering if it isn't the result of the universal binaries. It is only since they have been included in OS-X that I have noticed a significant performance slow down. Would one of those small programs that remove that aspect of OS-X make any difference? When I updated to OS-X.4.7 a few weeks ago, I noticed a number of odd glitches occurring. I used Disk Warrior and most went away. All except the slow performance. Bill