Index: options.keymap/src/org/netbeans/modules/options/keymap/KeymapModel.java
===================================================================
--- options.keymap/src/org/netbeans/modules/options/keymap/KeymapModel.java	(revision 21)
+++ options.keymap/src/org/netbeans/modules/options/keymap/KeymapModel.java	(working copy)
@@ -1,7 +1,7 @@
 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  *
- * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 1997-2009 Sun Microsystems, Inc. All rights reserved.
  *
  * The contents of this file are subject to the terms of either the GNU
  * General Public License Version 2 only ("GPL") or the Common
@@ -67,25 +67,29 @@
     private static final Logger LOG = Logger.getLogger(KeymapModel.class.getName ());
     private static final Logger UI_LOG = Logger.getLogger("org.netbeans.ui.options"); // NOI18N
                                     
-    private static ArrayList<KeymapManager> al = new ArrayList<KeymapManager>();
+    private static ArrayList<KeymapManager> al = null;
     
     /**
      * @return All the registered implementations.
      */
     public static Collection<? extends KeymapManager> getKeymapManagerInstances() {
-        if (!al.isEmpty()) {
+        if (null != al) {
             return al;
         }
-        al.addAll(Lookup.getDefault().lookupAll(KeymapManager.class));
-
-        if (LOG.isLoggable(Level.FINE)) {
-            LOG.fine("Dumping registered KeymapManagers: ");
-            for(KeymapManager m : al) {
-                LOG.fine("    KeymapManager: " + s2s(m));
+        
+        synchronized (KeymapModel.class) {
+            if (null == al) {
+                al = new ArrayList<KeymapManager>(Lookup.getDefault().lookupAll(KeymapManager.class));
+                al.trimToSize();
+                if (LOG.isLoggable(Level.FINE)) {
+                    LOG.fine("Dumping registered KeymapManagers: ");
+                    for (KeymapManager m : al) {
+                        LOG.fine("    KeymapManager: " + s2s(m));
+                    }
+                    LOG.fine("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
+                }
             }
-            LOG.fine("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
         }
-
         return al;
     }