Another PSN maintenance window has been scheduled for March 1st 2012, between 4pm and 7am the following day. As usual, your SEN Account, the PlayStation Store and associated services will be offline during this time. However, unlike normal, users who sign-in before the maintenance window will not be able to stay online.
If you are signed on to the PSN you will be signed out at the start of the downtime period. Users who attempt to log into their account after the maintenance begin will be presented with the site maintenance notification page.