Microsoft nie zaleca by wgrywać SP1 po wgraniu RU3 do CRM 2013, jeśli mamy RU3 i chcemy wgrać SP1 zalecane jest poczekanie na SP1 RU1
Important notes
If Update Rollup 3 is applied, we recommend that you wait until Update Rollup 1 for Microsoft Dynamics CRM 2013 Service Pack 1 (SP1) is available before you upgrade to the Service Pack 1 release stream. This is because Update Rollup 3 may contain fixes that are not included in Microsoft Dynamics CRM 2013 SP1.
Microsoft Dynamics CRM 2013 Update Rollup 3 includes compatibility for the Microsoft Dynamics CRM web application clients running Internet Explorer 11 and Windows 8.1 Update for x64-based Systems (KB2919355)
http://support.microsoft.com/kb/2930480/en-us