500 Internal Server Error while requesting notification rss feed w/o cookie

curl -v http://www.v2ex.com/n/[private_token].xml
* About to connect() to www.v2ex.com port 80 (#0)
* Trying 106.187.41.232... connected
* Connected to www.v2ex.com (106.187.41.232) port 80 (#0)
> GET /n/[private_token].xml HTTP/1.1
> User-Agent: curl/7.21.4 (universal-apple-darwin11.0) libcurl/7.21.4 OpenSSL/0.9.8r zlib/1.2.5
> Host: www.v2ex.com
> Accept: */*
>
< HTTP/1.1 500 Internal Server Error
< Date: Tue, 22 May 2012 09:42:33 GMT
< Content-Type: text/plain
< Content-Length: 890
< Connection: keep-alive
< Server: TornadoServer/2.2
< Set-Cookie: V2EX_LANG=en; Path=/
<
Traceback (most recent call last):
File "/usr/lib/python2.6/site-packages/tornado/web.py", line 988, in _execute
getattr(self, self.request.method.lower())(*args, **kwargs)
File "/www/v2ex/galaxy/handlers/web/notifications.py", line 53, in get
self.finalize('n.xml')
File "/www/v2ex/galaxy/handlers/feed/__init__.py", line 45, in finalize
self.write(template.render(self.values))
File "/usr/lib/python2.6/site-packages/Jinja2-2.6-py2.6.egg/jinja2/environment.py", line 894, in render
return self.environment.handle_exception(exc_info, True)
File "/www/v2ex/galaxy/templates/feed/n.xml", line 3, in top-level template code
<title>{{ site.title }} › {{ member.username }}</title>
File "/usr/lib/python2.6/site-packages/Jinja2-2.6-py2.6.egg/jinja2/environment.py", line 372, in getattr
return getattr(obj, attribute)
UndefinedError: 'member' is undefined
* Connection #0 to host www.v2ex.com left intact
* Closing connection #0

只有登陆后才能访问的RSS feed应该不是 @livid 的初衷吧。