There is a major bug in the script that wasn't spotted on the test site. The bugfix is in the mail, waiting for Jimbo to install it.
In the meantime, beware of editing and saving articles that contain special unicode characters in "&something;" notation. You might trash the page. Try preview first, if the whole page is visible, it should be OK.
Again, the bugfix is in the mail, and will probably online within minutes.
Sorry for the inconvenience, Magnus