Oh I am so glad you mentioned this as I have the same machine and every once in awhile the thread gets caught up. I thought it was my machine or I might be doing something wrong. Thanks for the info. I'll change threads.
Also I want to add that when I used Guttermann metalic looking thread it started shredding the getting caught up in the feed dogs. Too bad as the thread looked so pretty.
Does anyone know if all metalic's have this problem?
Ann in San Ramon