diff --git a/oxdata/movie/models.py b/oxdata/movie/models.py
index 3c95cbe..0e4767b 100644
--- a/oxdata/movie/models.py
+++ b/oxdata/movie/models.py
@@ -101,7 +101,7 @@ class Imdb(models.Model):
     episodeYear = models.CharField(max_length=4, blank=True, default='')
     episodeDirector = models.CharField(max_length=1000, blank=True, default='')
     seriesTitle = models.CharField(max_length=1000, blank=True, default='')
-    
+
     invalid = models.BooleanField(default=False)
     patch = DictField(default=None, blank=True, null=True)
 
diff --git a/oxdata/poster/models.py b/oxdata/poster/models.py
index fe9b500..5dc1bed 100644
--- a/oxdata/poster/models.py
+++ b/oxdata/poster/models.py
@@ -19,6 +19,7 @@ import ox.web.piratecinema
 
 from lookup.models import MovieId
 
+
 def getPosters(movie_id, url_prefix='', limit=lambda x, y: 0.3 < x/y < 1):
     if not movie_id:
         return {}
@@ -174,3 +175,13 @@ def get_poster_urls(m):
             addPoster(data['poster'], 'apple.com', m.imdb_id)
     '''
     #fixme: get 0xdb still, possibly imdb still as fallback?
+
+
+def cache_all_posters():
+    for p in PosterCache.objects.all().filter(failed=False, image='').order_by('-id'):
+        poster = p.get()
+        if poster and (not poster.width or not poster.height):
+            p.failed = True
+            p.status = "invalid image"
+            p.image.delete()
+            p.save()