I had been running Mach 2 for several years with no problems on my existing machine. I decided to upgrade to Mach 3 when I started using Aspire to learn more about 3d cutting. It wasn't till recently when I had to do some simple 2d cutting that I noticed this problem. It is actually more of a problem than I thought, if you look at the attached file were I tried cutting a series of squares with square corners, and radius corners then a circle and ellipse. You will notice that they all are distorted at the corners and incomplete, however the overall size of each is correct.