Players jumping into Battlegrounds today found themselves suffering the loss of AA over 200, macros, and all forms of XP.  Greg "Rothgar" Spence, EQII Lead Programmer, posted on the official forums:

The issue with AA's being reset seems to be a server configuration error.  We have locked the battlegrounds world to keep new matches from starting up while we fix the configuration.

We will have more information very soon about how to proceed if you're missing some AA after coming back.

UPDATE:

Rothgar posted:

There will be no server-wide rollback.  This problem affected about 200 users and rolling each back individually will be much less intrusive than taking down every world and rolling back all of their databases.

Please be sure to petition if you lost AA or XP due to battlegrounds.

You can also contact customer service via phone or live chat.