I remember there was discussion about transient windows that were created/destroyed very quickly hanging around.
I just experienced this with ROX. I was copying a very small text file to a sub-dir, and the "Copying..." window seems to have hung around as "Unnamed". All efforts at killing the window fail. It is also similar to the problem i've been having with GNOME apps' transient windows not going away. "Close" is disabled, "Kill Client" doesnt work, and "xkill" will not remove the window. If it helps, i have been changing styles around pretty frequently in the past 20 minutes... i'm trying to delete some styles i don't like, so i've been going back/forth between them. Screenshot: http://furt.com/blackbox/mlist_shots/transient-not-closing.jpg
