During to the update scheduled for todays server-save a problem occurred in the automated systems that didn't pull the full update properly.
This caused the worlds to not be able to start up normally and all worlds were offline for 8-12 minutes instead of 5-15 seconds.
We're sorry for the longer downtime.
The problem have been located and fixed and wont happen again.
The update was mostly for background systems of the core game, but todays update also brought 2 "public" updates concerning POI shortcut along with a fixed soulfire rune.
Little more details about those 2 are available in changelogs.