I think someone mentioned something about this before but now I have a good example. Both of Hello World and the Common Dialogs demo both show this strange behaviour. In Hello World the button is designed to appear in the middle of the windows. However, now it is in the lower right hand corner of the window. It isn't that the button has moved but the windows has resized itself to be smaller so that the right side and bottom of the window match the component furtherest to the right.

In the Common Dialogs window the "Close" button should be floating just above and to the right of the window edges but it also is aligned exactly with the edges of the window. Whatever coordinates you give the button the window realignes itself to match the button.

Something for you guys working on the alignment and resize to look at.