Your account is two months old, as anyone can see:

http://askubuntu.com/users/1319

    <td>member for</td>
    <td><span class="cool" title="2010-08-16 08:42:04Z">2 months</span></td>

So it seems you had the message inserted a long time ago, and just never visited until then.

(although it is true, we should remove the old messages after the poll ends, but this was really a special case in every way)