What I ended up doing? Uninstalling Flash. As should anyone.
Why?
This is Adobe’s interpretation of “automated update” for Flash:
Thus, my incredible loathing for Adobe and their incompetent management is best summarized by a hearty : “Fuck You, Adobe, all the way up to your CEO!”
Easier to just download the self-contained ISS screensaver. That doesn’t require Flash
http://sobolev.us/iss-hd-earth-viewing-experiment-screen-saver/