Backquotes in SQL not compatible with all DBMS (e.g. postgres). Unquo…

…ted appears standard -- http://docs.djangoproject.com/en/dev/topics/db/sql/

Signed-off-by: Patrick Lauber <patrick.lauber@divio.ch>

cms/signals.py

@@ -126,7 +126,7 @@ def post_save_user(instance, raw, created, **kwargs):
     # TODO: find a better way than an raw sql !!
 
     cursor = connection.cursor()
-    query = "INSERT INTO `%s` (`user_ptr_id`, `created_by_id`) VALUES (%d, %d)" % (
+    query = "INSERT INTO %s (user_ptr_id, created_by_id) VALUES (%d, %d)" % (
         PageUser._meta.db_table,
         instance.pk, 
         creator.pk