After an upgrade I am not able to install the key from an email. Previously this worked fine, and I would "view" the certificate and install the profile as it is called. But, now it does actually show the "intstall" button, but you cann not get it to press or install. The certificate is marked as trusted. Which I beleive indicates they have the chain correct.
The same person sends email to my Macbook and Apple Mail collects the key and put that into Keychain. So, it must be something on iOS6.1??