>> >some of the dancing windows.
>> That would be because it's trying to tell the window what to do and the
>> window isn't there anymore.
>So it is a bug then? I had a feeling that closing the dancing windows
>might cause problems, so it was the first thing I tried. It's just my
>way of responding creatively to interactive art...
A bug and I'm glad you found it - not only does it press me to check that
the window exists before moving it, but makes me consider what I might do
if it doesn't exist - create it again? create a different window to
replace it? tell you off for closing it? - another chance for creativity
where I hadn't thought to include it.