I've occasionally a really strage behavior on my vista-machine:

Somethims if I''m killing the Java-VM with a debugger attached, a windows doesn't die together with the java.exe process. It just
"hangs" around, no-movable and black.

When I'm inspecting the windows in Spy++, the window got adopted by the desktop window manager (dwn). The windows is a "Ghost" and "disabled". And if I kill the window with "task->bar-right-klick->close" the dwm-process gets restarted.

Has someone an idea how to explain this behavior? It isn't a problem, but I'm curious.

Sceen (black window and spy++):