Yesterday (August 20, 2010), Microsoft has released Cumulative Update package 3 for SQL Server 2008 R2. This Cumulative package will make build version 10.50.1734.0. Under this Cumulative package , Microsoft has provided a cumulative fix for 31 issues, which are being reported by customers.
Thus, now we have three cumulative patches for SQL Server 2008 R2, which makes build 10.50.1734.0 as a latest build for SQL Server.
Cumulative Update package 3 for SQL Server 2008 R2 was released on August 20, 2010, which makes a build 10.50.1734.0
Cumulative Update package 2 for SQL Server 2008 R2 was released on June 25, 2010, which makes a build 10.50.1702.0
Cumulative Update package 1 for SQL Server 2008 R2 was released on May 18, 2010, which makes a build 10.50.1720.0