diff --git a/anki/collection.py b/anki/collection.py
index a49457192..ef84f3df8 100644
--- a/anki/collection.py
+++ b/anki/collection.py
@@ -177,20 +177,6 @@ crt=?, mod=?, scm=?, dty=?, usn=?, ls=?, conf=?""",
             self.sched.onClose()
             self.dty = False
 
-    def rename(self, path):
-        raise "nyi"
-        # close our DB connection
-        self.close()
-        # move to new path
-        shutil.copy2(self.path, path)
-        os.unlink(self.path)
-        # record old dir
-        olddir = self.media.dir()
-        # reconnect & move media
-        self.path = path
-        self.reopen()
-        self.media.move(olddir)
-
     def usn(self):
         return self._usn if self.server else -1
 
diff --git a/anki/importing/anki2.py b/anki/importing/anki2.py
index 01d04d45c..616a1d167 100644
--- a/anki/importing/anki2.py
+++ b/anki/importing/anki2.py
@@ -90,7 +90,8 @@ class Anki2Importer(Importer):
                 # note we have the added note
                 self._notes[guid] = (note[0], note[4], note[2])
             else:
-                print "merging notes nyi"
+                # not yet implemented
+                pass
         # add to col
         self.dst.db.executemany(
             "insert or replace into notes values (?,?,?,?,?,?,?,?,?,?,?,?)",
@@ -183,6 +184,7 @@ class Anki2Importer(Importer):
         cards = []
         revlog = []
         cnt = 0
+        aheadBy = self.src.sched.today - self.dst.sched.today
         for card in self.src.db.execute(
             "select f.guid, f.mid, c.* from cards c, notes f "
             "where c.nid = f.id"):
@@ -207,6 +209,9 @@ class Anki2Importer(Importer):
             card[1] = self._notes[guid][0]
             card[2] = self._did(card[2])
             card[4] = intTime()
+            # review cards have a due date relative to collection
+            if card[7] == 2:
+                card[8] -= aheadBy
             cards.append(card)
             # we need to import revlog, rewriting card ids
             for rev in self.src.db.execute(
diff --git a/anki/upgrade.py b/anki/upgrade.py
index 2bc81e311..4db4bfe35 100644
--- a/anki/upgrade.py
+++ b/anki/upgrade.py
@@ -628,7 +628,6 @@ update cards set due = cast(
         col.conf['nextPos'] = (
             col.db.scalar("select max(id) from notes") or 0)+1
         col.save()
-
         # optimize and finish
         col.db.commit()
         col.db.execute("vacuum")