Using Google Chrome?
If you're using Google Chrome to access online courses, please remember that Google Chrome is not an officially supported Web browser for accessing online courses. While Chrome is based on the same code for displaying Web pages as Safari (which is supported), it's still different enough that it may cause problems. The part of Chrome that allows for interactivity in things like online quizzes is quite different, so there may be problems there.
The Center plans on officially supporting Chrome for accessing online courses in June, 2011, with the start of the next academic year.
If you are using Chrome, be sure that you are running the latest version. As of today (November 22, 2010), the latest version is version 7. If Chrome prompts you to upgrade to a new version, you should upgrade.