So far, it seems to be working. I did notice it not starting & printing once or twice, but the overwhelming majority of the time, it is working well.
Well a week later, and still the same as my last reply--it MIGHT have goofed up once or twice, but maybe not at all, but I've printed many many times and it is doing well.
Thanks for the idea of a firmware update. I would have thought that a driver update would have taken care of that, but those were two separate downloads.