Index: src/com/ecyrd/jspwiki/util/PriorityList.java
===================================================================
--- src/com/ecyrd/jspwiki/util/PriorityList.java	(revision 1362567)
+++ src/com/ecyrd/jspwiki/util/PriorityList.java	(working copy)
@@ -21,7 +21,7 @@
 package com.ecyrd.jspwiki.util;
 
 import java.util.AbstractList;
-import java.util.ArrayList;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 /**
  *  Builds a simple, priority-based List implementation.  The list
@@ -32,11 +32,10 @@
  *  Priority is an integer, and the list is sorted in descending order
  *  (that is, 100 is before 10 is before 0 is before -40).
  */
-@SuppressWarnings("unchecked")
 public class PriorityList
     extends AbstractList
 {
-    private ArrayList<Object> m_elements = new ArrayList<Object>();
+    private CopyOnWriteArrayList<Object> m_elements = new CopyOnWriteArrayList<Object>();
 
     /**
      *  This is the default priority, which is used if no priority