Index: /trunk/src/org/openstreetmap/josm/data/osm/TagCollection.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/data/osm/TagCollection.java	(revision 16976)
+++ /trunk/src/org/openstreetmap/josm/data/osm/TagCollection.java	(revision 16977)
@@ -464,5 +464,5 @@
      * Note that the order of the list is not preserved between method invocations.
      *
-     * @return the tags of this tag collection as list. There are no dupplicate values.
+     * @return the tags of this tag collection as list. There are no duplicate values.
      */
     public List<Tag> asList() {
@@ -713,5 +713,5 @@
 
     /**
-     * Replies the sum of all numeric tag values. Ignores dupplicates.
+     * Replies the sum of all numeric tag values. Ignores duplicates.
      * @param key the key to look up
      *
Index: /trunk/src/org/openstreetmap/josm/data/osm/TagMap.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/data/osm/TagMap.java	(revision 16976)
+++ /trunk/src/org/openstreetmap/josm/data/osm/TagMap.java	(revision 16977)
@@ -154,5 +154,5 @@
 
     /**
-     * Creates a new map using the given list of tags. For dupplicate keys the last value found is used.
+     * Creates a new map using the given list of tags. For duplicate keys the last value found is used.
      * @param tags The tags
      * @since 10736
Index: /trunk/src/org/openstreetmap/josm/gui/layer/LayerManager.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/layer/LayerManager.java	(revision 16976)
+++ /trunk/src/org/openstreetmap/josm/gui/layer/LayerManager.java	(revision 16977)
@@ -155,5 +155,5 @@
          * Schedule the removal of other layers after this layer has been deleted.
          * <p>
-         * Dupplicate removal requests are ignored.
+         * Duplicate removal requests are ignored.
          * @param layers The layers to remove.
          * @since 10507
Index: /trunk/test/unit/org/openstreetmap/josm/gui/layer/AutosaveTaskTest.java
===================================================================
--- /trunk/test/unit/org/openstreetmap/josm/gui/layer/AutosaveTaskTest.java	(revision 16976)
+++ /trunk/test/unit/org/openstreetmap/josm/gui/layer/AutosaveTaskTest.java	(revision 16977)
@@ -215,5 +215,5 @@
      */
     @Test
-    public void testAutosaveHandlesDupplicateNames() {
+    public void testAutosaveHandlesDuplicateNames() {
         DataSet data1 = new DataSet();
         OsmDataLayer layer1 = new OsmDataLayer(data1, "OsmData", null);
Index: /trunk/test/unit/org/openstreetmap/josm/gui/layer/LayerManagerTest.java
===================================================================
--- /trunk/test/unit/org/openstreetmap/josm/gui/layer/LayerManagerTest.java	(revision 16976)
+++ /trunk/test/unit/org/openstreetmap/josm/gui/layer/LayerManagerTest.java	(revision 16977)
@@ -386,5 +386,5 @@
      */
     @Test(expected = IllegalArgumentException.class)
-    public void testAddLayerChangeListenerDupplicates() {
+    public void testAddLayerChangeListenerDuplicates() {
         CapturingLayerChangeListener l = new CapturingLayerChangeListener();
         layerManager.addLayerChangeListener(l);