Basically this is a heads up that between 12 AM and 11 AM the server will be doing backlog which means its updating old standard quality episodes and looking for their glorious 720p counterparts where available. This equates to about 4 terabytes of new data. It will take some time to complete and no doubt there will be slowdowns while this is occurring. Please let me know if the schedule is too inconvenient.
LightSpeedTaco