diff --git a/pandora/archive/models.py b/pandora/archive/models.py
index f175001..b209cc7 100644
--- a/pandora/archive/models.py
+++ b/pandora/archive/models.py
@@ -84,7 +84,9 @@ class File(models.Model):
         self.folder = self.get_folder()
         self.sort_name = utils.sort_string(canonicalTitle(self.name))
 
-        if self.info:
+        if not os.path.splitext(self.name)[-1] in (
+            '.srt', '.rar', '.sub', '.idx', '.txt', '.jpg', '.png', '.nfo') \
+           and self.info:
             for key in ('duration', 'size'):
                 setattr(self, key, self.info.get(key, 0))
 
@@ -128,12 +130,14 @@ class File(models.Model):
                 self.pixels = int(self.width * self.height * float(utils.parse_decimal(self.framerate)) * self.duration)
 
         else:
-            self.is_video = os.path.splitext(self.name)[-1] in ('.avi', '.mkv', '.dv', '.ogv', '.mpeg', '.mov')
-            self.is_audio = os.path.splitext(self.name)[-1] in ('.mp3', '.wav', '.ogg', '.flac')
+            self.is_video = os.path.splitext(self.name)[-1] in ('.avi', '.mkv', '.dv', '.ogv', '.mpeg', '.mov', '.webm')
+            self.is_audio = os.path.splitext(self.name)[-1] in ('.mp3', '.wav', '.ogg', '.flac', '.oga')
             self.is_subtitle = os.path.splitext(self.name)[-1] in ('.srt', )
 
-        if not self.is_audio and not self.is_video and self.name.endswith('.srt'):
+        if self.name.endswith('.srt'):
             self.is_subtitle = True
+            self.is_audio = False
+            self.is_video = False
         else:
             self.is_subtitle = False
 
diff --git a/pandora/archive/views.py b/pandora/archive/views.py
index e179b75..ee3b0a5 100644
--- a/pandora/archive/views.py
+++ b/pandora/archive/views.py
@@ -105,6 +105,7 @@ def update(request):
                                                                          file__available=False,
                                                                          file__wanted=True)]
         response['data']['file'] = [f.file.oshash for f in files.filter(file__is_subtitle=True,
+                                                                        file__available=False,
                                                                         name__endswith='.srt')]
 
     return render_to_json_response(response)
@@ -149,6 +150,8 @@ def upload(request):
             response = json_response(status=403, text='permissino denied')
     if 'file' in request.FILES:
         if not f.available:
+            if f.data:
+                f.data.delete()
             f.data.save('data.raw', request.FILES['file'])
             f.available = True
             f.save()
diff --git a/pandora/item/models.py b/pandora/item/models.py
index 06a3ffc..a9f438a 100644
--- a/pandora/item/models.py
+++ b/pandora/item/models.py
@@ -729,11 +729,11 @@ class Item(models.Model):
         users = self.users_with_files()
         if users.filter(is_superuser=True).count()>0:
             files = self.files.filter(instances__volume__user__is_superuser=True)
-            users = User.objects.filter(volumes__files__file__item__in=files,
+            users = User.objects.filter(volumes__files__file__in=files,
                                         is_superuser=True).distinct()
         elif users.filter(is_staff=True).count()>0:
             files = self.files.filter(instances__volume__user__is_staff=True)
-            users = User.objects.filter(volumes__files__file__item__in=files,
+            users = User.objects.filter(volumes__files__file__in=files,
                                         is_staff=True).distinct()
         else:
             files = self.files.all()