Run the following application on mustang b51+ on solaris-sparc
(Solaris 10 + Gnome):
  http://columba.sourceforge.net/webstart/columba.jnlp
and you'll notice that the dialogs aren't painted correctly:
the bottom and the right part of the dialog don't get
painted at all. The shape of the area which is not painted
looks as if there was some kind of problem with the frame insets.

Note that the application uses Plastik look and feel, but I've
observed the same problem with other L&Fs (they can be set
from the "General Options" menu).

The problem first appeared in mustang RE nightly build from Sep 18, after
the last awt integration (the build starts at midnight, so Sep 18 build
contains changes from Sep 17).