Originally Posted by Weedwoman
What size needle are you using? The 306 takes a 206 x 13 needle; not the standard 15 x 1.
I'm using the 206x13, had to order them special.[/quote]
Check to make sure the needle is all the way up in the needle bar. It's also possible that the knicks on your bobbin case were put there before you got it--by someone trying to use the 15 x 1 needles. Have you tried to sew on it again since the Unfortunate Event??