Guys, thank you so much for all the great ideas. Given that everyone made a big effort to help me, I'm a bit embarrassed to report that it looks like it went away? I tried rebooting before and that didn't help. I rebooted a second time for an unrelated reason and that "fixed" it. I have no idea why. I feel like an idiot now. I will report if it comes back, but, for now, I think that was solved.