diff --git a/OpenChange/MAPIStoreObject.m b/OpenChange/MAPIStoreObject.m
index 045f2c742..d836eb2a2 100644
--- a/OpenChange/MAPIStoreObject.m
+++ b/OpenChange/MAPIStoreObject.m
@@ -452,6 +452,10 @@ static Class NSExceptionK, MAPIStoreFolderK;
   for (counter = 0; counter < aRow->cValues; counter++)
     {
       cValue = aRow->lpProps + counter;
+      if ((cValue->ulPropTag & PT_STRING8) == PT_STRING8)
+        [self warnWithFormat:
+                @"attempting to set string property as PR_STRING8: %.8x",
+              cValue->ulPropTag];
       [newProperties setObject: NSObjectFromSPropValue (cValue)
                         forKey: MAPIPropertyKey (cValue->ulPropTag)];
     }