From the ImmiAccount Notices in case you are in the process of drafting an application

"There will be a planned system outage on 22-23 November 2014.
This may impact some applications that have been started but not submitted before this date. If you have started an application for a subclass 132, 186, 187, 188, 189, 190, 462, 476, 485, 489, 887 or 888 visa we would encourage you to complete and submit the application ahead of the outage to avoid losing any information."