diff -r 3015c564fcbc -r 1e0532a6abff hotspot/src/share/vm/gc_interface/collectedHeap.cpp
--- a/hotspot/src/share/vm/gc_interface/collectedHeap.cpp	Thu May 27 09:54:07 2010 -0700
+++ b/hotspot/src/share/vm/gc_interface/collectedHeap.cpp	Thu May 27 18:01:56 2010 -0700
@@ -239,11 +239,11 @@
 }
 
 size_t CollectedHeap::filler_array_hdr_size() {
-  return size_t(arrayOopDesc::header_size(T_INT));
+  return size_t(align_object_offset(arrayOopDesc::header_size(T_INT))); // align to Long
 }
 
 size_t CollectedHeap::filler_array_min_size() {
-  return align_object_size(filler_array_hdr_size());
+  return align_object_size(filler_array_hdr_size()); // align to MinObjAlignment
 }
 
 size_t CollectedHeap::filler_array_max_size() {