I had it happen when I was playing with Light's install on the webspace (you have to access it via FTP, it's not listed).
He had a really sweet color selected for Animal Minimalis 2.4. I loaded up the custom color, may or amy not have played with the sliders, then hit the x to close it, and my whole program died (either froze or crashed, I forget which).
Anyway, you might try dling his install and seeing if you can reproduce it that way.