Do you listen to your machine when you sew? I was hearing what can only be described as a "popping" sound as I was stitching this morning. I immediately realized that it's been awhile since I changed the needle on the machine. Every new quilt deserves a new needle - they aren't that expensive! You should also change your needle after eight to ten hours of sewing. Dull needles can damage fabric. If you can't remember the last time you changed the needle, then be sure to do it now before you sew another seam.
And since I'm talking about machine care - when did you last remove the throat plate to clean out all the lint? I'll never forget the time a student asked me where she could buy another little felt pad for under the throat plate. Her machine had gone so long without cleaning that she thought all that stuff was a felt pad that was supposed to be there!
Don't forget to treat your machine to a "spa day" once a year also if you sew regularly - that is several times a week. She deserves a good cleaning, oiling and a check of her
tension and timing. She will be so much happier and so will you. Don't wait until she breaks down before getting her serviced - you need to care for your machine at least as well as you care for your car!
And now for the picture - I can see a bear staring to emerge , can't you?