Originally Posted by
blzzrdqueen
So I walked away for a while. I just came back and changed both top and bottom threads to a thinner thread and this seems to have stopped the issue. I have never had any problems until now with the previous thread, so I am baffled.
I have gone back and reread all of the posts, and the one thing no one has mentioned, when suddenly having this kind of problem, especially when starting a new project, is have you checked your needle size? Sometimes we forget about 'fixing the seam in the jeans' moments, when we need a heavier needle, and then when we go back to the usual fabric without changing the needle, you can have the problems that you describe.