Hi Doug, you are not nutty. I have also seen this problem intermittently. I have not established any pattern, and it also comes and goes for me. I mostly post from my MacBook, so I have not seen it that often. But it does seem to me I might have seem it on other web sites at times, but I am not sure. I will keep a look out and see if I can contribute any cause and effect or at least symptom patterns.
V