And once again were have new updates breaking OSD http://larslohmann.blogspot.dk/2014/11/hotfixes-that-breaks-osd.html
Microsoft has updated the support case: http://support.microsoft.com/kb/2894518
The new problematic updates are:
MS15-030: Description of the security update for Remote Desktop protocol: March 10, 2015
MS15-030: Vulnerability in Remote Desktop protocol could allow denial of service: March 10, 2015
Don’t we all just love this returning problem (or maybe not)