Microsoft has released Cumulative Update 5 for SQL Server 2008 R2 is released today. This will bring the SQL Server Version to 10.50.1753.0
This package contains all of the SQL Server 2008 R2 hotfixes that have been released since the initial release of SQL Server 2008 R2 RTM.
This cumulative update is available here
http://support.microsoft.com/hotfix/KBHotfix.aspx?kbnum=2438347&kbln=en-us
Cumulative Update 5 contains hotfixes for the Microsoft SQL Server 2008 R2 issues that have been fixed since the release of SQL Server 2008 R2. Complete list of bugs and hotfixes are available here.
Once you install this CU5 on SQL Server 2008 R2, you build version will become 10.50.1753, as shown a screen shot below
