MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
The layers shift when one of your stepper motors loses steps. It's actually pretty easy to create a pathologically jerky path that will cause this to happen in printers that otherwise seem properly tuned, so it is not too surprising that you'll occasionally run across a model that fails this way. Try lowering your printer's X and Y "jerk" values.