Index: Classes/DomainObject/AbstractEntity.php
===================================================================
--- Classes/DomainObject/AbstractEntity.php	(revision 2529)
+++ Classes/DomainObject/AbstractEntity.php	(working copy)
@@ -141,7 +141,7 @@
 		// We do this, because if the object itself contains a lazy loaded property, the comparison of the objects might fail even if the object didn't change
 		if (is_object($currentValue)) {
 			if ($currentValue instanceof Tx_Extbase_Persistence_ObjectMonitoringInterface) {
-				$result = !is_object($previousValue) || $currentValue->_isDirty() || (get_class($previousValue) !== get_class($currentValue));
+				$result = !is_object($previousValue) || $currentValue->_isDirty() || (get_class($previousValue) !== get_class($currentValue)) || ($previousValue != $currentValue);
 			} else {
 				// For all other objects we do only a simple comparison (!=) as we want cloned objects to return the same values.
 				$result = ($previousValue != $currentValue);