With every release of SQL Server product or subsequent service packs or Cumulative updates, new bugs are encountered or discovered. Below are some of the bugs which were fixed with the release of SQL Server 2012 Service Pack 1 (SP 1) for Microsoft SQL Server 2012.
SQL Server MSDN Bug Number 897566
FIX: SQM is turned off in SQL Server 2012 Service Pack CTPs.
SQL Server MSDN Bug Number 880228
FIX: Fix the UserGroup.Exists() reporting method in SQM and Watson.
SQL Server MSDN Bug Number 830970
Setup account validation method throws an exception when the Active Directory server is down.
SQL Server MSDN Bug Number 926981
“There was a failure to call cluster code from a provider. Exception message: Generic failure. Status code: 997” error message when you upgrade from SQL Server 2008 R2 SP1 to SQL Server 2012.
SQL Server MSDN Bug Number 828466
“Incorrect SKUs supported” message when you try to install SQL Server in clustered environment.
SQL Server MSDN Bug Number 973499
FIX: Persistent state is set to 1 when an IP address is created in SQL Server Multi-Subnet Clustering.
SQL Server MSDN Bug Number 858717
You cannot upgrade from Microsoft SQL Server 2008 or SQL Server 2008 R2 to SQL Server 2012 on a Windows 8-based cluster.
SQL Server MSDN Bug Number 878531
You cannot uninstall SQL Server 2012 that has dependencies on multiple mount points.
Hope this was helpful.
This is applicable for below versions of SQL Server
SQL Server 2014
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