java.util.ConcurrentModificationException
	at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:449)
	at java.util.AbstractList$Itr.next(AbstractList.java:420)
	at org.netbeans.modules.project.ui.OpenProjectList$RecentProjectList.getProjects(OpenProjectList.java:467)
	at org.netbeans.modules.project.ui.OpenProjectList.getRecentProjects(OpenProjectList.java:212)
	at org.netbeans.modules.project.ui.actions.RecentProjects.createSubMenu(RecentProjects.java:76)
	at org.netbeans.modules.project.ui.actions.RecentProjects.propertyChange(RecentProjects.java:103)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:333)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:270)
	at org.netbeans.modules.project.ui.OpenProjectList.close(OpenProjectList.java:168)
	at org.netbeans.modules.project.ui.actions.CloseProject.actionPerformed(CloseProject.java:59)
	at org.netbeans.modules.project.ui.actions.LookupSensitiveAction.actionPerformed(LookupSensitiveAction.java:68)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2167)
	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:5465)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3089)
	at java.awt.Component.processEvent(Component.java:5230)
	at java.awt.Container.processEvent(Container.java:1961)
	at java.awt.Component.dispatchEventImpl(Component.java:3933)
	at java.awt.Container.dispatchEventImpl(Container.java:2019)
	at java.awt.Component.dispatchEvent(Component.java:3781)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4205)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3885)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3815)
	at java.awt.Container.dispatchEventImpl(Container.java:2005)
	at java.awt.Window.dispatchEventImpl(Window.java:1764)
	at java.awt.Component.dispatchEvent(Component.java:3781)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
[catch] at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:234)
	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)