We are facing this exception (see attachment) reproducibly in our automated tests.
The test case opens Mobility Security Manager dialog and than closes it repeatedly.

java.lang.NullPointerException
at org.netbeans.modules.mobility.project.ui.customizer.NewConfigurationPanel.getName(NewConfigurationPanel.java:157)
at com.sun.java.swing.plaf.gtk.GTKStyle.getInsets(GTKStyle.java:263)
at javax.swing.plaf.synth.SynthStyle.installDefaults(SynthStyle.java:876)
at javax.swing.plaf.synth.SynthLookAndFeel.updateStyle(SynthLookAndFeel.java:252)
at javax.swing.plaf.synth.SynthPanelUI.updateStyle(SynthPanelUI.java:70)
at javax.swing.plaf.synth.SynthPanelUI.installDefaults(SynthPanelUI.java:57)
at javax.swing.plaf.basic.BasicPanelUI.installUI(BasicPanelUI.java:39)
at javax.swing.plaf.synth.SynthPanelUI.installUI(SynthPanelUI.java:37)
at javax.swing.JComponent.setUI(JComponent.java:668)
at javax.swing.JPanel.setUI(JPanel.java:136)
at javax.swing.JPanel.updateUI(JPanel.java:109)
at javax.swing.JPanel.<init>(JPanel.java:69)
at javax.swing.JPanel.<init>(JPanel.java:92)
at javax.swing.JPanel.<init>(JPanel.java:100)
at org.netbeans.modules.mobility.project.ui.customizer.NewConfigurationPanel.<init>(NewConfigurationPanel.java:74)

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evaluation from Mobility Pack team:
NewConfigurationPanel.getName() is called before NewConfigurationPanel
constructor is finished.

I can fix it on our side but this issue should be also reported to
com.sun.java.swing.plaf.gtk.GTKStyle owner.
Swing should not call getters of an instance before even parent constructor is finished.

originally reported as http://www.netbeans.org/issues/show_bug.cgi?id=103973