We’re performing server maintenance starting 3 a.m. EST on August 16. It won’t take longer than a day, but during that time you may experience increased latency and intermittent problems with posting.
Sorry about the inconvenience, Tumblr. We appreciate your patience.
Update, 11:55am: And we’re clear! Here’s to a bright future with our shiny new servers. As always, if you have any questions or concerns about Tumblr, our Help Center is right over here.