3/11/2014 8:25:42 AM
RE:Configuration Error Could not load file or assembly 'System.IdentityModel.Selectors, Version=184.108.40.206, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The system cannot find the file specified.
I'm seeing this error too, but on server 2012, on the live site. I found this microsoft KB article about a hotfix for 3.5. http://support.microsoft.com/kb/2803760
Unfortunately, I can't seem to find the hotfix for download.