Multiple "You closed the last window. Now what?" windows

When closing patches that have been opened from explorer and not from inside vvvv I get an extra “You closed the last window. Now what?” window each time I do it. Only one of them can be focused, the other are just hanging around inactive over desktop/other apps.

beta24.1 on Vista

cannot reproduce. set thread to fixed. please start a new thread with more details if this is happening for you with betas>25.1