masayoshi.okutsu@Eng 1997-01-14
The following has been reported by Toshiba.
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Description:

  ScrollPane on Solaris fails to set up its scroll bars
when ScrollPane#add() method is called twice or more,
so you have an IllegalArgumentException when you move
ScrollPane bars.

Cause:

MScrollPanePeer.java for Solaris/Motif uses only
FIRST child to measure its children's size, and
ScrollPanePeer DONT remove its child even if its
child is already set.