I had this problem for few days. Now its resolved.

This is what I did:

1. Download PB Update from here: http://www.evenbalance.com/index.php?page=pbsetup.php

2. Unzip and run the program as per normal.

3. Proceed with checking updates for PBSetup.

4. Click on "Add a Game".

5. Select Battlefield 3 from the list.

6. Click on Check for Updates.

7. Let the update be installed.

8. Ensure the Client version is v2.288 as shown below.



9. Enjoy yourself