--- old/src/share/vm/gc_implementation/parallelScavenge/psScavenge.cpp	2011-09-14 14:54:26.174324669 -0700
+++ new/src/share/vm/gc_implementation/parallelScavenge/psScavenge.cpp	2011-09-14 14:54:25.940550632 -0700
@@ -350,10 +350,9 @@
     }
     save_to_space_top_before_gc();
 
-    NOT_PRODUCT(reference_processor()->verify_no_references_recorded());
     COMPILER2_PRESENT(DerivedPointerTable::clear());
 
-    reference_processor()->enable_discovery();
+    reference_processor()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/);
     reference_processor()->setup_policy(false);
 
     // We track how much was promoted to the next generation for