Microsoft has released Cumulative Update 9 for SQL Server 2008 R2 RTM, which is Build 10.50.1804.0. I count 26 fixes in this Cumulative Update, which is for the RTM branch of SQL Server 2008 R2. Remember, this is completely separate from SQL Server 2008 SP2, which is the previous “major” version of SQL Server.

If you are still on the RTM branch of SQL Server 2008 R2, I would start thinking about and planning for how and when you are going move to the SP1 branch of SQL Server 2008 R2. You have some time, but at some point (probably in mid-2012), Microsoft is going to retire the RTM branch of SQL Server 2008 R2, which means that it will be considered an “unsupported service pack”. If you ever have to open a Support incident with Microsoft CSS, and they find out that you are on an “unsupported service pack” of SQL Server, they are not going to be able to give you the same level of support that you might expect…

Here is the current build chart for the two branches of SQL Server 2008 R2:

-- SQL Server 2008 R2 Builds                   SQL Server 2008 R2 SP1 Builds
-- Build            Description                Build         Description
-- 10.50.1092        August 2009 CTP2
-- 10.50.1352        November 2009 CTP3
-- 10.50.1450        Release Candidate
-- 10.50.1600        RTM
-- 10.50.1702        RTM CU1
-- 10.50.1720        RTM CU2
-- 10.50.1734        RTM CU3
-- 10.50.1746        RTM CU4
-- 10.50.1753        RTM CU5
-- 10.50.1765        RTM CU6     --->           10.50.2500    SP1 RTM
-- 10.50.1777        RTM CU7
-- 10.50.1797        RTM CU8     --->           10.50.2769    SP1 CU1
-- 10.50.1804        RTM CU9     --->           10.50.2772    SP1 CU2