The  Lync Server 2013 Server August 2014 Updates have been released. Below are some of the fixes that are in this CU. The link to the actual documentation is also below.

http://support.microsoft.com/kb/2809243

2967621 - Error 404 when Lync phones sign in to Lync Server 2013 front-end servers during SBS failure recovery

2967631 - Error ""DistributionGroupAddress" and "AgentsByUri" must be set." when you migrate the RG service to Lync Server 2013

2967623 - Error "This content cannot be displayed" or blank webpage when you click a dial-in URL in a Lync Server 2013 environment

2967624 - HD video stutters in a Lync Server 2013 based video conference in Lync 2013

2967628 - Telephone numbers are missing in a contact card in a Lync Server 2013-based Lync mobile client

2967626Error "creating procedure RtcResetAbAttributes" when you run "Install-CsDatabase" for rtcab database in Lync Server 2013

2967629 - Significant bandwidth usage increase by SIP traffic in a Lync Server 2013 environment

2979931 - Error "I can't find the meeting with that number" when PSTN user dials in to conference in Lync Server 2013 environment