diff --git a/anki/cards.py b/anki/cards.py
index 21cfab8d1..9ec9a2c98 100644
--- a/anki/cards.py
+++ b/anki/cards.py
@@ -3,7 +3,7 @@
 # License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
 import time
-from anki.utils import intTime, hexifyID
+from anki.utils import intTime, hexifyID, timestampID
 
 # Cards
 ##########################################################################
@@ -28,7 +28,7 @@ class Card(object):
             self.load()
         else:
             # to flush, set fid, ord, and due
-            self.id = intTime(1000)
+            self.id = timestampID(deck.db, "cards")
             self.gid = 1
             self.crt = intTime()
             self.type = 0
diff --git a/anki/facts.py b/anki/facts.py
index b4a1067ab..1d41004b7 100644
--- a/anki/facts.py
+++ b/anki/facts.py
@@ -6,7 +6,7 @@ import time
 from anki.errors import AnkiError
 from anki.utils import fieldChecksum, intTime, \
     joinFields, splitFields, ids2str, parseTags, canonifyTags, hasTag, \
-    stripHTML
+    stripHTML, timestampID
 
 class Fact(object):
 
@@ -17,7 +17,7 @@ class Fact(object):
             self.id = id
             self.load()
         else:
-            self.id = intTime(1000)
+            self.id = timestampID(deck.db, "facts")
             self._model = model
             self.gid = deck.defaultGroup(model.conf['gid'])
             self.mid = model.id
diff --git a/anki/models.py b/anki/models.py
index dc2e7267f..05575abbd 100644
--- a/anki/models.py
+++ b/anki/models.py
@@ -3,7 +3,8 @@
 # License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
 import simplejson
-from anki.utils import intTime, hexifyID, joinFields, splitFields, ids2str
+from anki.utils import intTime, hexifyID, joinFields, splitFields, ids2str, \
+    timestampID
 from anki.lang import _
 
 # Models
@@ -63,7 +64,7 @@ class Model(object):
             self.id = id
             self.load()
         else:
-            self.id = intTime(1000)
+            self.id = timestampID(deck.db, "models")
             self.name = u""
             self.conf = defaultConf.copy()
             self.css = ""
diff --git a/anki/utils.py b/anki/utils.py
index 698a8fc29..a486f6091 100644
--- a/anki/utils.py
+++ b/anki/utils.py
@@ -180,6 +180,15 @@ def ids2str(ids):
     """Given a list of integers, return a string '(int1,int2,...)'."""
     return "(%s)" % ",".join(str(i) for i in ids)
 
+def timestampID(db, table):
+    "Return a non-conflicting timestamp for table."
+    # be careful not to create multiple objects without flushing them, or they
+    # may share an ID.
+    t = intTime(1000)
+    while db.scalar("select id from %s where id = ?" % table, t):
+        t += 1
+    return t
+
 # Tags
 ##############################################################################
 
diff --git a/tests/test_deck.py b/tests/test_deck.py
index 3a76dc71b..5cfdbd235 100644
--- a/tests/test_deck.py
+++ b/tests/test_deck.py
@@ -2,6 +2,7 @@
 
 import os, re, datetime
 from tests.shared import assertException, getEmptyDeck, testDir
+from anki.stdmodels import BasicModel
 
 from anki import Deck
 
@@ -189,3 +190,11 @@ def test_addDelTags():
     f.load()
     assert f.tags[0] == "aaa"
     assert len(f.tags) == 2
+
+def test_timestamps():
+    deck = getEmptyDeck()
+    assert len(deck.models()) == 2
+    for i in range(100):
+        deck.addModel(BasicModel(deck))
+    assert len(deck.models()) == 102
+