Yep. I had trouble with my floor model, too. The thread was jumping back through a path it should only travel once! So it made a thunking noise when it was doing this and then it would break the thread. VERY annoying. They kept trying to tell me it was because I was putting my thread spool on in the wrong direction. I tried every way there was to put it on the machine and also tried a holder behind the machine. Same problem. After about six times in to get it fixed, they called and said I was getting a new machine since they couldn't get mine to stop doing what it was doing. I am very happy now!