>> Solutions would be wait and see if they update or find a new plugin.
That’s way more technical than anything I could have figured out. I did notice before you made this post that Adobe was telling me they had a new update I needed to download; normally I’m not in any hurry on these, but I thought maybe the reason we were all getting the black rectangle is simply cause none of us had updated our Flash plugin yet, so I went and did it right away. But it didn’t help, I still had the black rectangle. So I’m going with what you said.