From the EAC website

10.8.2010

Due to maintenance work behind scenes, the current version of EasyAntiCheat client will not be able to auto-update itself to the newer version released today.
Please re-download the client manually from the download section in order to update the client.
If even after re-downloading the client you are still getting a connection error, then you have not downloaded the new client but actually just an old copy from your web browser's cache.
In this case, please clean your web browser's cache and re-download a fresh copy of the new client.