It was done from the finder.

I have deleted images and re-inserted from the new file locations but they
still come back broken. And, as I mentioned, the links to the images show the
file path correctly. The site folders were moved but nothing inside them was
moved or renamed. And remember that the icons on the insert window are
broken too - that goes deeper than just folder moves.

Could this be a machine name change or disk name change? I don't see either
in the file paths anywhere.