From PlayOnline.com:

At the following time, we performed a version update of FINAL FANTASY XI.

[Affected Period]
Sep. 16, 2008 at 12:00 (PDT)

[Affected Services]
FINAL FANTASY XI

[Important Update Details]
- Adjusted the damage resistance of "Absolute Virtue."

The following issues have been addressed:

- An issue where the damage reduction from shields had increased.

- An issue where the damage for the weapon skill "Atonement" was incorrect when wearing certain equipment.

- An issue where white magic like "Erase" was unable to remove the effects of the Ranger job ability "Shadowbind."