Ticket #9272: admin_site_root.diff

sites.py

@@ -128 +128 @@
             self.check_dependencies()
 
         # Figure out the admin base URL path and stash it for later use
-        self.root_path = re.sub(re.escape(url) + '$', '', request.path)
+        self.root_path = re.sub(re.escape(url) + '$', '', request.path_info)
 
         url = url.rstrip('/') # Trim trailing slash, if it exists.