I've switched to the Memory Craft and IT has no problems with those bobbins. I think it's the AQS. There are times I wish I had never bought it. My husband bought it for me to take to quilt class because the MC is so much heavier. He's been wanting to get a Featherweight for me, maybe I should let him and take that to class!
I have to say, this trouble with the bobbins is making me think twice about a Janome embroidery machine. When I visit the dealer after Christmas, I think I'll ask them about this bobbin trouble. If I get a good answer, I'll let you all know.