Has the site been vandalized? Did someone accedentally delete information?
The wiki site keeps records of all the changes that were made to each page, allowing you to go back in time. Just click the history button on the bottom of the page. This will allow you to see previous editions of the page. In the Action collumn next to each previous copy of the page, there are three options: v, s, b
Click on b to rollback to that version directly, or click on v to first view the page before rolling back. You will have to confirm your choice.
