In June 2012, Vassar upgraded its moodle system to version 2.3. This version includes a number of improvements, but also is unable to support a few of the third-party functions we had been using in version 1.9. For an overview of these changes, please see this posting in the Techademia blog.
All of the basic functions for instructors are still present in the new version, but many are done quite differently. We've created the following collection of short "how-to" explanations for instructors and others who need to design and add materials to course sites. You can also find these and other helpful resources in the How To Use Moodle 2 pages within Moodle.