The "SinceWhen" tool reports these bugs, which should be investigated
and perhaps fixed for mustang

Missing "@since 1.6" for class java.awt.GridBagLayoutInfo
Missing "@since 1.6" for class java.awt.MultipleGradientPaint.ColorSpaceType
Missing "@since 1.6" for class java.awt.MultipleGradientPaint.CycleMethod
Incorrect "@since 1.6" (should be 1.5) for member java.awt.Window.setMinimumSize(java.awt.Dimension)
Missing "@since 1.6" for member java.awt.event.MouseAdapter.mouseMoved(java.awt.event.MouseEvent)
Missing "@since 1.6" for member java.awt.event.MouseAdapter.mouseDragged(java.awt.event.MouseEvent)
Missing "@since 1.6" for member java.awt.event.MouseAdapter.mouseWheelMoved(java.awt.event.MouseWheelEvent)