Maintenance mode is when the Scratch Team is modifying code on the Scratch Website. The website is only available to Scratch Team members during this time. Before the maintenance screen appears, the Scratch Team often gives advance warning in the Announcements forum, the news, and/or their twitter page, unless the maintenance screen is only in place for a short period of time or is for an unexpected reason. Throughout the duration of the maintenance, resources such as images used in Scratch Wiki signatures and saving project changes are not available, although Scratch 1.4/2.0 is available for download. During that period, one can still edit the wiki.
The current page contains a drawing of the Scratch Cat looking at a white board, the Scratch Team's Twitter feed, a message explaining the situation saying "The Scratch Team is making some changes to the website," and a link to download the Scratch 2.0 Offline Editor so users can still create and edit projects even during the downtime for maintenance.
The 1st maintenance mode page was headed "Server Maintenance" and features the Scratch Cat holding a drill while repairing some servers. Below Scratch is some text pointing towards the Scratch Team's Twitter account, and a link to download Scratch 1.4. At the very bottom of the page is a sign off by the Scratch Team.
The 2nd (and first one for Scratch 2.0) maintenance page featured Pico and Tera in yellow construction hard hats and Pico was holding a wrench. It was headed "We're working on our servers. Scratch will be back soon." Like the newest version, it had a Twitter feed. The page title is "Scratch is down for maintenance!"
The 3rd maintenance mode page features the Scratch Cat drawing on a whiteboard and a Twitter feed. It is headed with "The Scratch Team is making some changes to the website." It gives the user a suggestion to refresh the page and a reminder that they can still use the offline editor. The Scratch Logo is pinned at the bottom. The page title is still kept the same ("Scratch is down for maintenance!").
The 4th (for transition between Scratch 2 and Scratch 3) maintenance mode pages features images from Scratch 3 and a reminder to check the Scratch Team's Twitter feed. The background loops through different colours.