A new KB article (2760556) has been released that contains several fixes RTM versions of Lync 2013 Virtual Desktop Infrastructure (VDI) clients
“….Microsoft has released an update for Microsoft Lync 2013. This update provides the latest fixes for Lync 2013.
This update fixes several bugs in the RTM versions of Lync 2013 Virtual Desktop Infrastructure (VDI) clients. Additionally, after you apply this update, you do not have to re-enter a username and password when you pair a Lync 2013 VDI plugin with a Lync 2013 Desktop client.
You can apply this hotfix on both Lync 2013 VDI clients and Lync 2013 Desktop clients…”
Source and download: http://support.microsoft.com/kb/2760556