My guess is you got flagged by possible-sockpuppet. See news.arc in arc3.tar for why some stuff gets ignored.<p><pre><code>    (def possible-sockpuppet (user)
      (or (ignored user)
          (&#60; (uvar user weight) .5)
          (and (&#60; (user-age user) new-age-threshold*)
               (&#60; (karma user) new-karma-threshold*))))
</code></pre>
Since your age and karma don't seem to be a problem, I'd guess an admin or editor marked you as ignored, or an admin reduced your weight.