NBU 188.8.131.52 and MS Windows 2012
NBU 184.108.40.206 has just been released (im sure more detail information is coming under announcements)
You can download it here : http://www.symantec.com/docs/TECH204644
Please review the 220.127.116.11 Release Notes for additional known issues, fixes, and other general information for this release.
Be sure to also review the 7.5 Late Breaking News - http://www.symantec.com/docs/TECH178334
For more info on MS Server 2012, Please refer to blog : https://www-secure.symantec.com/connect/blogs/windows-2012-support-netbackup
The 7.x Opertating Sytem Compatibility list has been updated : http://www.symantec.com/docs/TECH76648