Exceptions from JDK 1.6.0 b51

java.lang.NullPointerException
	at java.awt.Component.requestFocusHelper(Component.java:7009)
	at java.awt.Component.requestFocusHelper(Component.java:6997)
	at java.awt.Component.requestFocus(Component.java:6817)
	at javax.swing.JComponent.requestFocus(JComponent.java:1501)
	at org.netbeans.core.windows.view.ViewHierarchy.updateDesktop(ViewHierarchy.java:673)
	at org.netbeans.core.windows.view.DefaultView.changeGUI(DefaultView.java:329)
	at org.netbeans.core.windows.ViewRequestor.dispatchRequest(ViewRequestor.java:238)
	at org.netbeans.core.windows.ViewRequestor.processRequest(ViewRequestor.java:214)
	at org.netbeans.core.windows.ViewRequestor.postRequest(ViewRequestor.java:152)
	at org.netbeans.core.windows.ViewRequestor.scheduleRequest(ViewRequestor.java:91)
	at org.netbeans.core.windows.Central.addModeClosedTopComponent(Central.java:635)
	at org.netbeans.core.windows.Central.userClosedTopComponent(Central.java:1533)
	at org.netbeans.core.windows.view.DefaultView.userClosedTopComponent(DefaultView.java:724)
	at org.netbeans.core.windows.view.ui.TabbedHandler.actionPerformed(TabbedHandler.java:292)
	at org.netbeans.swing.tabcontrol.TabbedContainer.postActionEvent(TabbedContainer.java:662)
	at org.netbeans.swing.tabcontrol.TabbedContainerUI.shouldPerformAction(TabbedContainerUI.java:134)
	at org.netbeans.swing.tabcontrol.plaf.DefaultTabbedContainerUI.access$2600(DefaultTabbedContainerUI.java:80)
	at org.netbeans.swing.tabcontrol.plaf.DefaultTabbedContainerUI$DisplayerActionListener.actionPerformed(DefaultTabbedContainerUI.java:1229)
	at org.netbeans.swing.tabcontrol.TabDisplayer.postActionEvent(TabDisplayer.java:513)
	at org.netbeans.swing.tabcontrol.TabDisplayerUI.shouldPerformAction(TabDisplayerUI.java:144)
	at org.netbeans.swing.tabcontrol.plaf.BasicTabDisplayerUI.access$1500(BasicTabDisplayerUI.java:74)
	at org.netbeans.swing.tabcontrol.plaf.BasicTabDisplayerUI$BasicDisplayerMouseListener.performCommand(BasicTabDisplayerUI.java:689)
	at org.netbeans.swing.tabcontrol.plaf.BasicTabDisplayerUI$BasicDisplayerMouseListener.potentialCommand(BasicTabDisplayerUI.java:674)
	at org.netbeans.swing.tabcontrol.plaf.BasicTabDisplayerUI$BasicDisplayerMouseListener.mouseReleased(BasicTabDisplayerUI.java:722)
	at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:231)
	at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:231)
	at java.awt.Component.processMouseEvent(Component.java:5926)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
	at java.awt.Component.processEvent(Component.java:5691)
	at java.awt.Container.processEvent(Container.java:1960)
	at java.awt.Component.dispatchEventImpl(Component.java:4365)
	at java.awt.Container.dispatchEventImpl(Container.java:2018)
	at java.awt.Component.dispatchEvent(Component.java:4195)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4222)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3886)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3816)
	at java.awt.Container.dispatchEventImpl(Container.java:2004)
	at java.awt.Window.dispatchEventImpl(Window.java:2202)
	at java.awt.Component.dispatchEvent(Component.java:4195)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)

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java.lang.NullPointerException
	at java.awt.Component.requestFocusHelper(Component.java:7009)
	at java.awt.Component.requestFocusInWindow(Component.java:6931)
	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:355)
	at java.awt.Component.dispatchEventImpl(Component.java:4237)
	at java.awt.Container.dispatchEventImpl(Container.java:2018)
	at java.awt.Window.dispatchEventImpl(Window.java:2202)
	at java.awt.Component.dispatchEvent(Component.java:4195)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
[catch] at java.awt.SequencedEvent.dispatch(SequencedEvent.java:98)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)