We had a bit of server trouble yesterday after a PHP upgrade and some other changes meant that this specific instance of Drupal was causing the serving Apache thread to segfault. As there was some new module and database activity going on prior to the outage our sysadmin attempted to resolve the issue  with a database restore. While it's nice to know our backups are working, the last snapshot was from before my blog entry regarding some concers about our web presence. The error turned out to be a mod_php and Apache threads issue which has been resolved by reconfiguring the Apache server. Almost everything is working now, the viewing of revisions appears to be broken for some other reason. That'll be looked into soon. In the mean time I'm going to attempt a redux on my web precence blog post.

Update: Our sysadmin has already applied a patch for the revisions page which was needed because Drupal was depending on a feature/bug in PHP that was changed in the version of PHP that was recently deployed on our server.