Hi Everyone,

SQL Server 2008 SP3 CU12 was released on July 15, 2013. You can get more information from the KB listed below.

2863205  Cumulative update package 12 for SQL Server 2008 SP3

For the issues that fix in this CU, please refer to the below table:

VSTS bug number

KB article number

Description

1178048

2793580

(http://support.microsoft.com/kb/2793580/ )

FIX: An update is
  available that enables you to exclude system databases from Query Statistics
  collection sets when you use the management data warehouse in SQL Server 2008
  R2 or in SQL Server 2008

1325147

2803799

(http://support.microsoft.com/kb/2803799/ )

FIX: A query that runs
  against a DMV enters an infinite loop in SQL Server 2008 R2, SQL Server 2008
  or SQL Server 2012

1337795

2812884

(http://support.microsoft.com/kb/2812884/ )

FIX: Index size
  increases significantly after you rebuild the index online and the RCSI is
  enabled in SQL Server 2008 or in SQL Server 2008 R2

1361672

2859713

(http://support.microsoft.com/kb/2859713/ )

FIX: "The
  decryption key is incorrect" error when you open a symmetric key that is
  encrypted by an asymmetric key in SQL Server 2008

1274213

2861939

(http://support.microsoft.com/kb/2861939/ )

FIX: Cannot uninstall,
  repair, add new features to, or add a new instance to SQL Server 2008 in
  Windows 8

1194531

2819662

(http://support.microsoft.com/kb/2819662/ )

FIX: SQL Server
  performance issues in NUMA environments

 

For more information on SQL CU version,
please refer to the following link:

http://blogs.technet.com/b/hot/archive/2012/09/29/sql-cu-version-information.aspx