Index: trunk/src/org/openstreetmap/josm/gui/history/SelectionSynchronizer.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/history/SelectionSynchronizer.java	(revision 15768)
+++ trunk/src/org/openstreetmap/josm/gui/history/SelectionSynchronizer.java	(revision 15769)
@@ -52,9 +52,10 @@
         DefaultListSelectionModel referenceModel = (DefaultListSelectionModel) e.getSource();
         int i = referenceModel.getMinSelectionIndex();
+        int j = referenceModel.getMaxSelectionIndex();
         for (ListSelectionModel model : participants) {
             if (model == e.getSource()) {
                 continue;
             }
-            model.setSelectionInterval(i, i);
+            model.setSelectionInterval(i, j);
         }
         preventRecursion = false;
Index: trunk/src/org/openstreetmap/josm/gui/history/TagInfoViewer.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/history/TagInfoViewer.java	(revision 15768)
+++ trunk/src/org/openstreetmap/josm/gui/history/TagInfoViewer.java	(revision 15769)
@@ -71,5 +71,5 @@
         TagTableModel tagTableModel = model.getTagTableModel(pointInTime);
         JTable table = new JTable(tagTableModel, new TagTableColumnModel());
-        table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
+        table.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
         selectionSynchronizer.participateInSynchronizedSelection(table.getSelectionModel());
         table.setTransferHandler(new TagInfoTransferHandler());
@@ -88,5 +88,7 @@
 
         tagMenu.add(trackJosmAction(new CopyValueAction(table, tagKeyFn, objectSp)));
-        tagMenu.add(trackJosmAction(new CopyKeyValueAction(table, tagKeyFn, objectSp)));
+        final CopyKeyValueAction copyKeyValueAction = new CopyKeyValueAction(table, tagKeyFn, objectSp);
+        tagMenu.add(trackJosmAction(copyKeyValueAction));
+        tagMenu.addPopupMenuListener(copyKeyValueAction);
         tagMenu.add(trackJosmAction(new CopyAllKeyValueAction(table, tagKeyFn, objectSp)));
         tagMenu.addSeparator();