title: How come twitter's since & until params won't work?
body: <p><a href="http://search.twitter.com/search?q=twitter+since%3A2010-01-01+until%3A2010-01-01" rel="nofollow">http://search.twitter.com/search?q=twitter+since%3A2010-01-01+until%3A2010-01-01</a>
  I tried to search for the term "twitter" between 2010-01-01 to 2011-01-01 and it won't return any results, anyone know why? If I do a recent time range it works.</p>