diff --git a/src/server/caches.py b/src/server/caches.py
index d311b19fb4..16f2fbd09f 100644
--- a/src/server/caches.py
+++ b/src/server/caches.py
@@ -6,6 +6,8 @@ Central caching module.
 from sys import getsizeof
 from collections import defaultdict
 from django.conf import settings
+from src.server.models import ServerConfig
+from src.utils.utils import to_str, uses_database
 
 _ENABLE_LOCAL_CACHES = settings.GAME_CACHE_TYPE
 
@@ -13,6 +15,12 @@ _GA = object.__getattribute__
 _SA = object.__setattr__
 _DA = object.__delattr__
 
+if uses_database("mysql") and ServerConfig.objects.get_mysql_db_version() < '5.6.4':
+    # mysql <5.6.4 don't support millisecond precision
+    _DATESTRING = "%Y:%m:%d-%H:%M:%S:000000"
+else:
+    _DATESTRING = "%Y:%m:%d-%H:%M:%S:%f"
+
 # OOB hooks (OOB not yet functional, don't use yet)
 _OOB_FIELD_UPDATE_HOOKS = defaultdict(dict)
 _OOB_PROP_UPDATE_HOOKS = defaultdict(dict)
@@ -35,12 +43,12 @@ def hashid(obj):
         hid = _GA(obj, "_hashid")
     except AttributeError:
         try:
-            date, idnum = _GA(obj, "db_date_created"), _GA(obj, "id")
+            date, idnum = _GA(obj, "db_date_created").strftime(_DATESTRING), _GA(obj, "id")
         except AttributeError:
             try:
                 # maybe a typeclass, try to go to dbobj
                 obj = _GA(obj, "dbobj")
-                date, idnum = _GA(obj, "db_date_created"), _GA(obj, "id")
+                date, idnum = _GA(obj, "db_date_created").strftime(_DATESTRING), _GA(obj, "id")
             except AttributeError:
                 # this happens if hashing something like ndb. We have to
                 # rely on memory adressing in this case.
@@ -194,7 +202,10 @@ if _ENABLE_LOCAL_CACHES:
         hid = hashid(obj)
         global _FIELD_CACHE
         if hid:
-            del _FIELD_CACHE[hashid(obj)]
+            try:
+                del _FIELD_CACHE[hashid(obj)]
+            except KeyError, e:
+                pass
         else:
             # clean cache completely
             _FIELD_CACHE = defaultdict(dict)
@@ -241,7 +252,10 @@ if _ENABLE_LOCAL_CACHES:
         hid = hashid(obj)
         global _PROP_CACHE
         if hid:
-            del _PROP_CACHE[hashid(obj)]
+            try:
+                del _PROP_CACHE[hid]
+            except KeyError,e:
+                pass
         else:
             # clean cache completely
             _PROP_CACHE = defaultdict(dict)
@@ -295,6 +309,13 @@ if _ENABLE_LOCAL_CACHES:
             _ATTR_CACHE = defaultdict(dict)
 
 
+    def flush_obj_caches(obj=None):
+        "Clean all caches on this object"
+        flush_field_cache(obj)
+        flush_prop_cache(obj)
+        flush_attr_cache(obj)
+
+
 else:
     # local caches disabled. Use simple pass-through replacements
 
diff --git a/src/utils/dbserialize.py b/src/utils/dbserialize.py
index 0c24908480..44c1d36a1d 100644
--- a/src/utils/dbserialize.py
+++ b/src/utils/dbserialize.py
@@ -28,6 +28,7 @@ except ImportError:
 from django.db import transaction
 from django.core.exceptions import ObjectDoesNotExist
 from django.contrib.contenttypes.models import ContentType
+from src.server.models import ServerConfig
 from src.utils.utils import to_str, uses_database
 from src.utils import logger
 
diff --git a/src/utils/idmapper/base.py b/src/utils/idmapper/base.py
index 5e6032c60a..e70f59d8c7 100755
--- a/src/utils/idmapper/base.py
+++ b/src/utils/idmapper/base.py
@@ -210,6 +210,8 @@ def update_cached_instance(sender, instance, **kwargs):
     if not hasattr(instance, 'cache_instance'):
         return
     sender.cache_instance(instance)
+    from src.server.caches import flush_obj_caches
+    flush_obj_caches(instance)
 post_save.connect(update_cached_instance)
 
 def cache_size(mb=True):