Index: trunk/src/org/openstreetmap/josm/gui/dialogs/properties/TagEditHelper.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/dialogs/properties/TagEditHelper.java	(revision 7882)
+++ trunk/src/org/openstreetmap/josm/gui/dialogs/properties/TagEditHelper.java	(revision 7883)
@@ -507,4 +507,5 @@
 
                    values.setPossibleACItems(valueList);
+                   values.getEditor().selectAll();
                    objKey=key;
                }