java.util.ConcurrentModificationException
   at java.util.ArrayList.sort(ArrayList.java:1456)
   at java.util.Collections.sort(Collections.java:175)
   at org.netbeans.modules.bugtracking.tasks.dashboard.TaskContainerNode.createChildren(TaskContainerNode.java:323)
   at org.netbeans.modules.team.commons.treelist.TreeListNode$ChildrenLoader$1.run(TreeListNode.java:365)
   at java.lang.Thread.run(Thread.java:745)