I just tried it and it doesn't work for me. It works on the internal drives, but not the FW.
I tried all sorts of variations, including closing with keyboard shortcuts, with the mouse, mazimizing, dragging to resize, etc. Nothing works.
Not a huge deal, just annoying. I may have some glitch as I have not done a clean reinstall on this box for quite some time.
In a while I'll try plugging it in on another machine and see.