Using last NB build 200511011936.

java.lang.AssertionError
	at
org.netbeans.modules.quickfilechooser.ChooserComponentUI$CompleteAction.actionPerformed(ChooserComponentUI.java:380)
	at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1571)
	at javax.swing.JComponent.processKeyBinding(JComponent.java:2763)
	at javax.swing.JComponent.processKeyBindings(JComponent.java:2798)
	at javax.swing.JComponent.processKeyEvent(JComponent.java:2726)
	at java.awt.Component.processEvent(Component.java:5265)
	at java.awt.Container.processEvent(Container.java:1966)
	at java.awt.Component.dispatchEventImpl(Component.java:3955)
	at java.awt.Container.dispatchEventImpl(Container.java:2024)
	at java.awt.Component.dispatchEvent(Component.java:3803)
	at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1810)
	at
java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:672)
	at
java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:920)
	at
java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:798)
	at
java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:636)
	at java.awt.Component.dispatchEventImpl(Component.java:3841)
	at java.awt.Container.dispatchEventImpl(Container.java:2024)
	at java.awt.Window.dispatchEventImpl(Window.java:1774)
	at java.awt.Component.dispatchEvent(Component.java:3803)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
	at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
	at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
	at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:153)
	at java.awt.Dialog$1.run(Dialog.java:515)
	at java.awt.Dialog.show(Dialog.java:536)
	at org.netbeans.core.windows.services.NbPresenter.superShow(NbPresenter.java:800)
	at org.netbeans.core.windows.services.NbPresenter.doShow(NbPresenter.java:843)
	at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:831)
	at org.openide.util.Mutex.doEventAccess(Mutex.java:1146)
	at org.openide.util.Mutex.readAccess(Mutex.java:183)
	at org.netbeans.core.windows.services.NbPresenter.show(NbPresenter.java:816)
	at java.awt.Component.show(Component.java:1300)
	at java.awt.Component.setVisible(Component.java:1253)
	at
org.netbeans.modules.java.platform.ui.PlatformsCustomizer.addNewPlatform(PlatformsCustomizer.java:307)
	at
org.netbeans.modules.java.platform.ui.PlatformsCustomizer.access$000(PlatformsCustomizer.java:61)
	at
org.netbeans.modules.java.platform.ui.PlatformsCustomizer$1.actionPerformed(PlatformsCustomizer.java:160)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
	at
javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:234)
	at java.awt.Component.processMouseEvent(Component.java:5488)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3126)
	at java.awt.Component.processEvent(Component.java:5253)
	at java.awt.Container.processEvent(Container.java:1966)
	at java.awt.Component.dispatchEventImpl(Component.java:3955)
	at java.awt.Container.dispatchEventImpl(Container.java:2024)
	at java.awt.Component.dispatchEvent(Component.java:3803)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3892)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
	at java.awt.Container.dispatchEventImpl(Container.java:2010)
	at java.awt.Window.dispatchEventImpl(Window.java:1774)
	at java.awt.Component.dispatchEvent(Component.java:3803)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
	at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
	at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
	at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:153)
	at java.awt.Dialog$1.run(Dialog.java:515)
	at java.awt.Dialog.show(Dialog.java:536)
	at org.netbeans.core.windows.services.NbPresenter.superShow(NbPresenter.java:800)
	at org.netbeans.core.windows.services.NbPresenter.doShow(NbPresenter.java:843)
	at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:831)
	at org.openide.util.Mutex.doEventAccess(Mutex.java:1146)
	at org.openide.util.Mutex.readAccess(Mutex.java:183)
	at org.netbeans.core.windows.services.NbPresenter.show(NbPresenter.java:816)
	at java.awt.Component.show(Component.java:1300)
	at java.awt.Component.setVisible(Component.java:1253)
	at
org.netbeans.api.java.platform.PlatformsCustomizer.showCustomizer(PlatformsCustomizer.java:44)
	at
org.netbeans.modules.java.platform.ui.PlatformsCustomizerAction.performAction(PlatformsCustomizerAction.java:29)
	at
org.openide.util.actions.CallableSystemAction$1.run(CallableSystemAction.java:94)
	at
org.netbeans.modules.openide.util.ActionsBridge.doPerformAction(ActionsBridge.java:47)
	at
org.openide.util.actions.CallableSystemAction.actionPerformed(CallableSystemAction.java:90)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
	at javax.swing.AbstractButton.doClick(AbstractButton.java:302)
	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1000)
	at
javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1041)
	at java.awt.Component.processMouseEvent(Component.java:5488)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3126)
	at java.awt.Component.processEvent(Component.java:5253)
	at java.awt.Container.processEvent(Container.java:1966)
	at java.awt.Component.dispatchEventImpl(Component.java:3955)
	at java.awt.Container.dispatchEventImpl(Container.java:2024)
	at java.awt.Component.dispatchEvent(Component.java:3803)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3892)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
	at java.awt.Container.dispatchEventImpl(Container.java:2010)
	at java.awt.Window.dispatchEventImpl(Window.java:1774)
	at java.awt.Component.dispatchEvent(Component.java:3803)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
	at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
	at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)