Here is another leak reported by NetBeans:

private static sun.awt.AppContext sun.awt.AppContext.mainAppContext->
sun.awt.AppContext@26b4e29b-table->
java.util.HashMap@5193b022-table->
[Ljava.util.HashMap$Entry;@7e383efa-[7]->
java.util.HashMap$Entry@69624a1c-value->
javax.swing.RepaintManager@15c8132a-paintManager->
javax.swing.BufferStrategyPaintManager@3d721ae2-root->
org.netbeans.core.windows.services.NbDialog@68de462-descriptor->
org.openide.WizardDescriptor@51e67ac

We should check if/when the "root" field in BSPM should be cleared.