Joined: 16 Jun 04
Database downtime scheduled. This weekend (starting saturday the 10th, 08:00 UTC) there will be 24 hours of downtime to correct an issue where big sessions requiring large amounts of memory can block smaller sessions from getting started. To flush the render queue no more sessions will be accepted for rendering until after the downtime.
For more information about the issue see this post.
Until then we will use a backup queueing strategy which is almost as good and could be applied right away with no downtime.