Courses used for dissertations submissions (primarily those with 499 course codes) will be reset and therefore unavailable on 15 September. You must download any materials you need from these courses before this date. See the LTI blog for more details http://blogs.lse.ac.uk/lti/moodle-news-features-and-information/moodle-end-of-year-arrangements/
New features for Moodle
Moodle was upgraded to version 2.7 as part of the reset process. The changes to Moodle are minimal and are outlined on the LTI blog along with some features of Moodle that you may not be aware of.