problem with wp

Hi all,
I have been using WP for my magazine http://www.onthego.to, and I recently switched to a new template. I have been using it to post new updates, widgets and other stuff.
But when I log in to wp-admin, all the posts/pages have disappeared (but they are still there). My question is did WP undergo some kind of maintenance this past weekend?