diff --git a/greenmine/scrum/api.py b/greenmine/scrum/api.py
index 4593f33f..a1fc8f5d 100644
--- a/greenmine/scrum/api.py
+++ b/greenmine/scrum/api.py
@@ -36,6 +36,8 @@ class ProjectList(generics.ListCreateAPIView):
     model = Project
     serializer_class = ProjectSerializer
 
+    def pre_save(self, obj):
+        obj.owner = self.request.user
 
 class ProjectDetail(generics.RetrieveUpdateDestroyAPIView):
     model = Project
@@ -47,6 +49,9 @@ class MilestoneList(generics.ListCreateAPIView):
     serializer_class = MilestoneSerializer
     filter_fields = ('project',)
 
+    def pre_save(self, obj):
+        obj.owner = self.request.user
+
 
 class MilestoneDetail(generics.RetrieveUpdateDestroyAPIView):
     model = Milestone
@@ -71,6 +76,9 @@ class ChangeList(generics.ListCreateAPIView):
     model = Change
     serializer_class = ChangeSerializer
 
+    def pre_save(self, obj):
+        obj.owner = self.request.user
+
 
 class ChangeDetail(generics.RetrieveUpdateDestroyAPIView):
     model = Change
@@ -81,6 +89,9 @@ class ChangeAttachmentList(generics.ListCreateAPIView):
     model = ChangeAttachment
     serializer_class = ChangeAttachmentSerializer
 
+    def pre_save(self, obj):
+        obj.owner = self.request.user
+
 
 class ChangeAttachmentDetail(generics.RetrieveUpdateDestroyAPIView):
     model = ChangeAttachment
@@ -92,6 +103,9 @@ class TaskList(generics.ListCreateAPIView):
     serializer_class = TaskSerializer
     filter_fields = ('user_story', 'milestone', 'project')
 
+    def pre_save(self, obj):
+        obj.owner = self.request.user
+
 
 class TaskDetail(generics.RetrieveUpdateDestroyAPIView):
     model = Task
diff --git a/greenmine/scrum/models.py b/greenmine/scrum/models.py
index 408f3e6c..2f5046b5 100644
--- a/greenmine/scrum/models.py
+++ b/greenmine/scrum/models.py
@@ -191,7 +191,8 @@ class Milestone(models.Model):
     uuid = models.CharField(max_length=40, unique=True, blank=True)
     name = models.CharField(max_length=200, db_index=True)
     slug = models.SlugField(max_length=250, unique=True, blank=True)
-    owner = models.ForeignKey('base.User', related_name="milestones", blank=True)
+    owner = models.ForeignKey('base.User', related_name="milestones",
+                              null=True, blank=True)
     project = models.ForeignKey('Project', related_name="milestones")
 
     estimated_start = models.DateField(null=True, default=None)
@@ -204,8 +205,6 @@ class Milestone(models.Model):
     disponibility = models.FloatField(null=True, default=0.0)
     order = models.PositiveSmallIntegerField("Order", default=1)
 
-    tags = PickledObjectField()
-
     def save(self, *args, **kwargs):
         if not self.slug:
             self.slug = slugify_uniquely(self.name, self.__class__)
@@ -216,15 +215,6 @@ class Milestone(models.Model):
         ordering = ['-created_date']
         unique_together = ('name', 'project')
 
-    @property
-    def total_points(self):
-        """
-        Get total story points for this milestone.
-        """
-
-        total = sum(iter_points(self.user_stories.all()))
-        return "{0:.1f}".format(total)
-
     def __unicode__(self):
         return self.name
 
diff --git a/greenmine/scrum/serializers.py b/greenmine/scrum/serializers.py
index 4b76e4ab..95008644 100644
--- a/greenmine/scrum/serializers.py
+++ b/greenmine/scrum/serializers.py
@@ -41,8 +41,7 @@ class UserStorySerializer(serializers.ModelSerializer):
 
 
 class MilestoneSerializer(serializers.ModelSerializer):
-    tags = PickleField()
-    user_stories = UserStorySerializer(many=True)
+    user_stories = UserStorySerializer(many=True, required=False)
 
     class Meta:
         model = Milestone