Version: Service Pack HotFix Date Server Seq Client Notes
4.6.2.30xxx SP2 HF 3
KB2873471
June 2013     U  

link to KB 2873471

Appears to fix an issue where the Client issue when SP2 is used with "Microsoft Live Essentials" or a Microsoft Account.  Symptom is prompting for credentials for every virtual app launch after a server publishing refresh.