I have the same problem. Clients are freaking. All was well up until Dec 25th for us. I have an email into support. I am THINKING it is related to a Microsoft Windows Update as all worked fine and then a couple of days after that Sunday (we install updates on Sunday night) the trouble reports started coming in. I am in the process of waiting for one of our servers to finish some processes so I can reboot after uninstalling every update or program (silverlight) that got installed on the 27th of December. Will see.