I just started a new quilt -- or at least I have started to make some lovely blocks that may end up as a quilt one of these days. . .. Anyway, I was having a problem with the threads in the fabric pulling (almost like when you pull a thread to find out where the straight of grain is) as I was sewing. I couldn't figure out what was wrong, but I finally decided it was the needle and, sure enough, when I replaced it, the stitching was perfect.
It's not like I never change the needle, in fact, I had changed it a couple of times lately when I broke (!) not one but two needles as I was trying to make a diaper bag and had real problems, probably cause I used much too stiff an interfacing.
So, this just a reminder that, if you are having some sewing problems and even if you think your needle is not the culprit, try changing the needle. Worked for me.
Thanks for letting me share.