When you run a program in Java Web Start and the program has windows
that are look-and-feel decorated, any warning text added by Java Web
Start appears below the window frame. It looks ugly. When you use
the window-system-provided window decorations, the text appears in
a little box at the bottom of the window, which looks better.

Also, the look-and-feel decorated window run with JWS can't be
resized from the bottom.

NOTE: The text is at the bottom in Windows XP. In
Solaris, the text is at the top and the window
can't be resized from the top.

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I'd like to add a little more to this description. I've found that if one clicks around the area, possibly trying to resize anyway, the mouse cursor gets confused and you can end up with the mouse cursor permanently showing the resize cursor.
###@###.### 2003-05-06

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Another symptom is that the preferred size of the window isn't
calculated correctly, which can cause layout problems. (The window
contents are too tall, as far as I can tell.) This is obvious
if you run SplitPaneDividerDemo in the Java Tutorial.

###@###.### 2003-07-24