Update Rollup 6 for CRM 2011

Official available on 12 January 2012 for download now.

KB : 2600640

Download HERE

• You must have Microsoft Dynamics CRM 2011 build 5.0.9688.583 installed to apply this update rollup.
• You cannot remove Update Rollup 6. Specific database updates are applied in Update Rollup 6 that will not let you uninstall Update Rollup 6. You should back up your databases before you install this update. 
• contains the Dynamics CRM Q4 Service Update features
• is a cumulative update rollup that includes all the fixes

The full install packages (slipstreams) for version 5.0.9689.1985, were re-released. This was the install packages that included Update Rollup 6. Due to this re-release the old install packages are no longer valid for future Update Rollups. [updated 21/Jan]
http://support.microsoft.com/kb/2668504

cheers