by Ken Task.
Obviously, there is no backward compatibility.
Am sure you know, however, might want to pass this along to the server admin/op at school:
This is the last formal release of the 2.1 branch. Support for this branch has been discontinued. We highly recommend you upgrade!
Date 14th January 2013
From: http://download.moodle.org/
But, maybe the reason for their delay is the upward requirements for running Moodle. In any case, any app that is allowed to fall too far behind in updates is probably prone to problems and might be low picking fruit for any that decide to 'harvest'.
Many listed beginning Jan. 2013 have granted access level: none. access: remote. complexity: low.
'spirit of sharing', Ken