I couldn't resist and I went in the room. As I talked to my son, attempting to help him appreciate my dilemma, I fiddled around with it. Can't say I did any one thing differently, but wouldn't you know. I pulled out some scraps and it sewed like a charm. I haven't been back on it. I have to work the next two days and will be out of town after that until next Tuesday so don't think I'll get to do anything until after that. (But while I'm away I will get to an awesome fabric store! I'll feel better then!)
Some little sewing gremlin I'm sure. :P