more detail that would be helpful -- e.g., what was in the icon view
window, and were any of the items shown there "popped open" in their
own windows?

Dear Allin!

The icon view window content was:

- a bundle, as a result of a personal function (that I'm testing)

- 3 matrices retrived from the bundle

And, though not quite sure, I think that a matrix was edited in its own window.

Otherwise, I was mainly using the console and sometimes getting back to the function code for some adjustments. I also was editing the help text for the function...and probably its window was also open.

Artur