--- a/web/hdabo/models.py	Mon Jul 11 17:20:30 2011 +0200
+++ b/web/hdabo/models.py	Mon Jul 11 18:19:45 2011 +0200
@@ -113,7 +113,10 @@
     
     def save(self, *args, **kwargs):
         self.normalized_label = normalize(self.label)
-        super(Tag, self).save(*args,**kwargs) 
+        super(Tag, self).save(*args, **kwargs) 
+            
+    class Meta:
+        unique_together = (('label', 'original_label', 'url_status'),)
         
 class Location(models.Model):
     name = models.CharField(max_length=512, unique=False, blank=False, null=False)