MR 816 Dropouts Mac

Hey Guys,
I am very frustrated and have not found any resolve yet on this issue. I actually did a complete re-install for another issue I was having and the problem still persists. Next I am gonna replace the firewire cable I am using which is a 400 to 800 with a different adapter style cable and see if that makes any difference. Any progress on your end?
Please keep us all posted!
THanks