Update 19th July 2012: This issue has now been resolved. Please use the Moodle self-check link again for all your TurnItIn self-checks.
The Turnitin Originality/Plagiarismim Self Check for student assignments within moodle is down.
Students and staff who try and use it may receive the error:
Submission failed. Please try again. A site configuration error occurred when attempting to send this file to Turnitin.
There is a work-around, which students can access by going to:
IT is working on the Turnitin within moodle, and we will inform you when the issue is resolved.