TwitterUserItemUrls is empty. Why isn't SFM fetching URLS?

Have you set up a cron job to run fetch_urls?

I tried to add a filterstream using the user that I've configured as TWITTER_DEFAULT_USER, but SFM is telling me that Streamsample is also configured to authenticate as that user. But I'm not using Streamsample!

SFM makes the assumption that streamsample either is being used or may be used in the future, and streamsample authenticates with the Twitter API using TWITTER_DEFAULT_USER. Due to Twitter API's rate limiting, SFM prevents the possibility of having multiple streams (in this case, streamsample and a filterstream) simultaneously calling the Twitter streaming API with the same Twitter user name.