Our systems experienced a glitch in how we calculated disk usage for customers between November 29th and 30th. We have corrected the error, and no action is needed to ensure that you are billed correctly for the month. Some customers received an email (in error) notification that disk usage was over quota. We apologize for any confusion this has caused and have taken steps to ensure the same glitch does not happen again.
To view your account’s current disk usage, please visit our Member Tools page and go to Account -> Resource Usage -> Current Disk Usage.
— Joe @ System Operations