There are reviews and threads on patternreview.com addressing this and other problems with the QE 4.0. Apparently, it's a dream machine for many but a real headache for other owners. Just recently, one was posted for sale in the QB classifieds by a new user, with no mention of problems, before the post was deleted by admin. The same person posted on patternreview that she's having problems with it. It's now for sale on sewitsforsale. Definitely a model to test drive before buying.