Index: trunk/src/org/openstreetmap/josm/data/validation/tests/TagChecker.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/validation/tests/TagChecker.java	(revision 5269)
+++ trunk/src/org/openstreetmap/josm/data/validation/tests/TagChecker.java	(revision 5270)
@@ -170,4 +170,11 @@
      */
     private static void initializeData() throws IOException {
+        checkerData.clear();
+        ignoreDataStartsWith.clear();
+        ignoreDataEquals.clear();
+        ignoreDataEndsWith.clear();
+        ignoreDataKeyPair.clear();
+        ignoreDataTwoKeyPair.clear();
+
         spellCheckKeyData = new HashMap<String, String>();
         String sources = Main.pref.get( PREF_SOURCES, "");