We are encountering a new error message using Anyconnect client version 3.1.06073 on two different MAC Book Pro's.  When attempting to connect we receiving an error stating, "The certificate on the secure gateway is invalid.  A VPN connection will not be established."  We are not experiencing this issue connecting from Windows 7, Windows 8.1, iPhone, or Android.  We have checked the certificate and verified that it is a valid third party certificate.

Has anyone else run across this error?