Bah, that's really crappy.
Looks like the Local-Cert workaround is failing for me now:
15/02/11 20:03:50 Attempting to connect to IP address: 87.106.15.67
15/02/11 20:03:50 Sending login.
15/02/11 20:03:51 login OK
15/02/11 20:03:51 UDP packet optimisation selected (reduces server load).
15/02/11 20:03:51 Connecting to Authentication Server on 87.106.15.67:443
SSL_CTX_use_PrivateKey_file failed
And regular cert is still giving me that lovely error. I'm patient though.