SCOM - An error occurred while performing a database operation. The error code was {0}

Si luego de instalar ACS en System Center Operation Manager empieza a aparecer el siguiente error:

Audit Collection Services (ACS) events cannot be collected correctly. Additionally, Operations Manager displays the following error message:
An error occurred while performing a database operation. The error code was {0}

Te cuento que recientemente Microsoft lanzó un hotfix que lo soluciona, revisa el siguiente articulo

http://support.microsoft.com/kb/951979