I have a lot of usb stuff strung out: 6 kbds, 5 mice (three kinds), 4 audio interfaces, 7 hubs not counting in kbds, etc.; most powered. At the root of the USB tree is a KVM switch feeding a new MacBook (10.5.2) and a G5-Quad (10.4.11) This all pretty much works fine and runs for weeks without...