diff --git a/README b/README
index 02505dec4..83116ded4 100644
--- a/README
+++ b/README
@@ -5,8 +5,9 @@ To setup a development instance of pan.do/ra,
 you need python, bazaar, pip and virtualenv and several other python modules:
 
 * Packages
-    apt-get install python-setuptools python-pip python-virtualenv ipython
-    apt-get install python-dev python-imaging python-numpy python-psycopg2
+    apt-get install bzr git subversion mercurial \
+            python-setuptools python-pip python-virtualenv ipython \
+            python-dev python-imaging python-numpy python-psycopg2
 
     bzr branch http://code.0x2620.org/pandora pandora
     cd pandora
@@ -17,13 +18,12 @@ you need python, bazaar, pip and virtualenv and several other python modules:
     bzr branch http://code.0x2620.org/oxjs
 
 * Additional pandora tools:
-  You need current versions of mkvtoolnix, oxframe, oxtimeline installed.
+  You need current versions of oxframe, oxtimeline installed.
   For Ubuntu we provide these packages in a ppa:
-    sudo apt-get install python-software-properties
-    sudo add-apt-repository ppa:j/pandora
-    sudo add-apt-repository ppa:gstreamer-developers/ppa
-    sudo apt-get update
-    sudo apt-get install oxframe oxtimeline mkvtoolnix
+    apt-get install python-software-properties
+    add-apt-repository ppa:j/pandora
+    apt-get update
+    apt-get install oxframe oxtimeline 
 
 * Database
   We use postgresql but other databases might also work
diff --git a/pandora/item/models.py b/pandora/item/models.py
index 875681c11..40a7bc29b 100644
--- a/pandora/item/models.py
+++ b/pandora/item/models.py
@@ -760,8 +760,15 @@ class Item(models.Model):
     def update_selected(self):
         for s in self.sets():
             if s.filter(Q(is_video=True)|Q(is_audio=True)).filter(available=False).count() == 0:
+                update = False
+                deselect = self.files.filter(selected=True).exclude(id__in=s)
+                if deselect.count() > 0:
+                    deselect.update(selected=False)
+                    update = True
                 if s.filter(selected=False).count() > 0:
                     s.update(selected=True, wanted=False)
+                    update = True
+                if update:
                     self.rendered = False
                     self.save()
                     self.update_timeline()
@@ -1117,18 +1124,3 @@ class Facet(models.Model):
             self.value_sort = utils.sort_string(self.value)
         super(Facet, self).save(*args, **kwargs)
 
-
-class PosterUrl(models.Model):
-
-    class Meta:
-        unique_together = ("item", "service", "url")
-        ordering = ('-height', )
-
-    item = models.ForeignKey(Item, related_name='poster_urls')
-    url = models.CharField(max_length=1024)
-    service = models.CharField(max_length=1024)
-    width = models.IntegerField(default=80)
-    height = models.IntegerField(default=128)
-
-    def __unicode__(self):
-        return u'%s %s %dx%d' % (unicode(self.item), self.service, self.width, self.height)
diff --git a/pandora/item/timelines.py b/pandora/item/timelines.py
index fa4e70499..3d8af1504 100644
--- a/pandora/item/timelines.py
+++ b/pandora/item/timelines.py
@@ -1,12 +1,13 @@
 # -*- coding: utf-8 -*-
 # vi:si:et:sw=4:sts=4:ts=4
-
 from __future__ import division, with_statement
-
+import os
 from glob import glob
 
 import Image
 
+import ox
+
 def loadTimeline(timeline_prefix, height=64):
     files = sorted(glob('%s%sp*.png' % (timeline_prefix, height)))
     f = Image.open(files[0])
@@ -98,6 +99,7 @@ def join_timelines(timelines, prefix):
        timeline_name = '%s%sp%04d.png' % (prefix, height, i)
        timeline.crop((0, 0, pos, height)).save(timeline_name)
 
+    ox.makedirs(os.path.dirname(prefix))
     makeTiles(prefix, 16, 3600)
     makeTimelineOverview(prefix, 1920, height=16)
     makeTimelineOverview(prefix, 1920, height=64)