401 on Twitter API

[kivutar]

I'm trying to get eg/twitter.pl working. It looks like this sample code is out of date : I had to prefix some strings with oauth_.
The thing is I'm still getting a 401.
I even tried to edit lib/Net/HTTP/Spore/Middleware/Auth/OAuth.pm and hardcode the authorization header from twitter oath tools (wich I tried with curl and is working) without success.