This version update contains the game data for the add-on scenario "A Moogle Kupo d'Etat—Evil in Small Doses." After downloading the update and purchasing a registration code, the scenario will become playable.
* Players must be level 10 or above to participate in the add-on scenario missions.
* After purchasing a registration code, a period of time may be required before the in-game content becomes accessible.
* If the "A Moogle Kupo d'Etat" logo remains faded even after purchase, please wait a few minutes and exit to the PlayOnline FINAL FANTASY XI main page. After this, return to the game title screen and examine the logo again.
 

Get the full patch notes here.