Index: /trunk/src/org/openstreetmap/josm/gui/tagging/ac/AutoCompletingComboBox.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/tagging/ac/AutoCompletingComboBox.java	(revision 3311)
+++ /trunk/src/org/openstreetmap/josm/gui/tagging/ac/AutoCompletingComboBox.java	(revision 3312)
@@ -71,5 +71,5 @@
             
             // if the text starts with a number we don't autocomplete
-            if (!Main.pref.getBoolean("autocomplete.dont_complete_numbers", false)) {
+            if (Main.pref.getBoolean("autocomplete.dont_complete_numbers", true)) {
                 try {
                     Long.parseLong(str);
Index: /trunk/src/org/openstreetmap/josm/gui/tagging/ac/AutoCompletingTextField.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/tagging/ac/AutoCompletingTextField.java	(revision 3311)
+++ /trunk/src/org/openstreetmap/josm/gui/tagging/ac/AutoCompletingTextField.java	(revision 3312)
@@ -72,5 +72,5 @@
             String currentText = getText(0, getLength());
             // if the text starts with a number we don't autocomplete
-            if (!Main.pref.getBoolean("autocomplete.dont_complete_numbers", false)) {
+            if (Main.pref.getBoolean("autocomplete.dont_complete_numbers", true)) {
                 try {
                     Long.parseLong(str);