How funny. I had a similar experience a few weeks ago with my Janome 11000. I was having a heck of time with embroidery - the bobbin thread kept pulling to the top. I finally gave up and took it in to the shop. I was using the quilting foot instead of the embroidery foot. We changed the foot and the embroidery was once again perfect. I really, really, really need to check the book every time I start a new project!!!