Can't be healed

[Burura]

Since the new expansion wen't live on Wednesday night my character can't be healed by anything but the /heal command. He can be the target of heals of any sort, but when they land, they hit for 0 every time. Regen effects don't work either.
The same thing happened to a friend of mine. She was able to fix it by going to "Check Files" in the Playonline main menu, but I've tried this for both Playonline and Final Fantasy XI and neither has solved the problem or even detected it. I just restored my computer to the way it was yesterday morning (prior to the expansion's installation) and the problem persists.

Platform: Windows
ISP: AT&T
Type of Connection: CATV
Connection Speed: ?
Frequency: Constant, ever since it first occurred
Character: Burura
Race: TarutaruM
World: Asura
Main Job: 95 Thief
Sub Job: 47 Dancer
Area: Gustav Tunnel, (F-7)
Party: Party of 2
NPC: None
Monster: First noticed while fighting Doom Guard