--- branches/development/src/brains/BlockSnapshotManager.cpp	2011/09/14 21:15:17	1629
+++ branches/development/src/brains/BlockSnapshotManager.cpp	2012/07/03 18:32:27	1764
@@ -36,7 +36,8 @@
  * [1]  Meineke, et al., J. Comp. Chem. 26, 252-271 (2005).             
  * [2]  Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006).          
  * [3]  Sun, Lin & Gezelter, J. Chem. Phys. 128, 24107 (2008).          
- * [4]  Vardeman & Gezelter, in progress (2009).                        
+ * [4]  Kuang & Gezelter,  J. Chem. Phys. 133, 164101 (2010).
+ * [5]  Vardeman, Stocker & Gezelter, J. Chem. Theory Comput. 7, 834 (2011).
  */
 #include <algorithm>
 #include "brains/BlockSnapshotManager.hpp"
@@ -226,6 +227,7 @@ namespace OpenMD {
   Snapshot* BlockSnapshotManager::loadFrame(int frame){
     Snapshot* snapshot = new Snapshot(nAtoms_, nRigidBodies_, nCutoffGroups_, getStorageLayout());
     snapshot->setID(frame);
+    snapshot->clearDerivedProperties();
     
     /** @todo fixed me */
     Snapshot* oldSnapshot = currentSnapshot_;