I read whole Timing Issue thread, but didn't find solution to my problem.

I got jumpy mouse when I extract files or add large movies to itunes (itunes move filest to it's own directory). Also sounds starts scratch. But when exctracting files is completed, problem goes away.

I have Asus A8n-Sli nforce4 with amd x2 4200+ processor and sata hard-drive. I use latest voodoo kernel in 10.5.6, but the problem was also in 10.5.5. Could it be ethernet or sata-related problem?