Invalid entry on archive posts list

I’m assuming that this is related to some sort of database corruption – possibly from an interruption during submission of a post or something like that.

Anyway – if you look at the monthly archives list at the side of the page on this site: http://www.elginism.com/ you will see that the final item on the list just says 0. If you follow this link, it shows the archive for the current month (April 2009), plus one post from August 2008. This post also shows up fine in the August archive too though.

I’ve looked at the 3 posts that appear in this archive in PHP Myadmin in the wp_posts table & compared them to other posts. Nothing seems particularly out of place however.

Does anyone have any idea what might be going on or where I should start looking to try & fix this?