As part of their Incremental Service Modelling, Microsoft have released SQL Server 2012 Service Pack 1 Cumulative Update #9.
To apply this cumulative update package, you must be running SQL Server 2012 SP1. So it is pertinent for versions 11.0.3000 – 11.0.3393.0 but is not for SQL Server 2012 RTM (11.0.2100 – 11.0.2999).
The build number of the cumulative update package is 11.0.3412.0. You may have to restart the computer after you apply this cumulative update package.
This CU contains 29 fixes.
The stand out fix for me is FIX: Error when you create new report subscriptions after you apply CU7 or CU8 for SQL Server 2012 SP1