I just set up my Maslow from East Bay a few days ago (same board as noted recently) when I suddenly had more time than previously expected and was able to do so over a few days. After reading about webcontrol and holey being the best option I flashed the firmware to find that as soon as the USB was connected I ran into the same issue previously mentioned but I also ran into trouble with my left motor constantly running. As soon as USB was disconnected from the computer the run away motors on the z and left axis both stopped. Hope this additional info may help! Looking at possibly updating the boards as well so if/when that happens I may be able to send you the set w/ the 1.26b firmware if it would help as well.