*** old/src/share/vm/opto/subnode.cpp	Fri May  8 12:53:18 2009
--- new/src/share/vm/opto/subnode.cpp	Fri May  8 12:53:18 2009

*** 635,644 ****
--- 635,650 ----
      ciKlass* klass0 = p0->klass();
      bool    xklass0 = p0->klass_is_exact();
      ciKlass* klass1 = p1->klass();
      bool    xklass1 = p1->klass_is_exact();
      int kps = (p0->isa_klassptr()?1:0) + (p1->isa_klassptr()?1:0);
+     while (klass0->is_obj_array_klass() && klass1->is_obj_array_klass()) {
+       // Compare klasses of obj arrays elements.
+       klass0 = klass0->as_obj_array_klass()->element_klass();
+       klass1 = klass1->as_obj_array_klass()->element_klass();
+       
+     }
      if (klass0 && klass1 &&
          kps != 1 &&             // both or neither are klass pointers
          klass0->is_loaded() && !klass0->is_interface() && // do not trust interfaces
          klass1->is_loaded() && !klass1->is_interface()) {
        bool unrelated_classes = false;