“Sorry, no posts matched your criteria.” WTF?

Perhaps later, but for now I think I’ve somewhat solved the problem.

There’s this line on my wp-comments page:
<input type="hidden" name="comment_post_ID" value="291" />
<input type="hidden" name="redirect_to" value="http://www.hersoul.org/index.php?p=291" />

It goes to p=291, but since this is a new blog I don’t have a page like that for it to redirect to, so it says there are no entries to be found since I haven’t written that much yet. What should it be instead? I tried just setting it to index.php, but that only redirects commenters to the main page and doesn’t post the comment either.