Index: /trunk/src/org/openstreetmap/josm/data/osm/Relation.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/data/osm/Relation.java	(revision 3116)
+++ /trunk/src/org/openstreetmap/josm/data/osm/Relation.java	(revision 3117)
@@ -388,5 +388,5 @@
                     throw new DataIntegrityProblemException(String.format("Relation member must be part of the same dataset as relation(%s, %s)", getPrimitiveId(), rm.getMember().getPrimitiveId()));
             }
-            if (Main.pref.getBoolean("debug.checkDeleteReferenced")) {
+            if (Main.pref.getBoolean("debug.checkDeleteReferenced", true)) {
                 for (RelationMember rm: members) {
                     if (rm.getMember().isDeleted())
Index: /trunk/src/org/openstreetmap/josm/data/osm/Way.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/data/osm/Way.java	(revision 3116)
+++ /trunk/src/org/openstreetmap/josm/data/osm/Way.java	(revision 3117)
@@ -372,5 +372,5 @@
                     throw new DataIntegrityProblemException("Nodes in way must be in the same dataset");
             }
-            if (Main.pref.getBoolean("debug.checkDeleteReferenced")) {
+            if (Main.pref.getBoolean("debug.checkDeleteReferenced", true)) {
                 for (Node n: nodes) {
                     if (n.isDeleted())