I've used the New Library panel to copy symbols from one Flash document to another & subsequently closed the extra Library panel. I did this twice for on different occasions.
My Library panel is usually docked & collapsed so ocassionally I use Crtl-L to expand it. Now, when I do that, the previous 2 extra Library panels also appear & I have 3 Library panels on the screen - 1 docked & 2 extra floating ones! How do I get rid of the other 2 for good?