Ok, this has been this way for awhile, but I finally remembered to post it.
When you drag and drop, say from a describe dialog and you want to put it into the editor you have on top, you have to be very careful because if there is an open editor behind the one you want to drag to, it will gain focus and pop to the top.
Very, very annoying and not at all what you would want or expect.
I believe that this also happens with the DB navigators too. I guess it’s at least consistently annoying.