Index: src/org/openstreetmap/josm/io/MultiFetchServerObjectReader.java
===================================================================
--- src/org/openstreetmap/josm/io/MultiFetchServerObjectReader.java	(revision 2595)
+++ src/org/openstreetmap/josm/io/MultiFetchServerObjectReader.java	(working copy)
@@ -195,7 +195,9 @@
                     continue;
                 }
             }
-            appendGeneric(member.getMember());
+            if (!member.getMember().isIncomplete()) {
+                appendGeneric(member.getMember());
+            }
         }
         return this;
     }