Dennis, do me a favor and post you xml and the g code your running when it shows its head. On second thought, copy and zip your entire mach 3 folder and send to me via email please. I'm redoing the controls on my mill right now but I will do some testing as soon as I get it back together. I hate you or anyone else is having this problem. The random ones are the toughest to dig out. What version of mach are you running?
Brett