A picture is worth a thousand words and 30 pictures per second plus audio is worth a great deal more.
This is just a quick video of what my Replicator was doing when I attempted to print (or in this case, go through the steps of leveling the build platform). The X axis was skipping and/or doubling-back in the wrong direction.
This turned out to be a bad X-cable connecting the stepper motor to the motherboard. They sent me a new cable and the fix (swapping out the cable) was incredibly simple.
