Comment 2 for bug 759114

hi, same problem than in the 746973 bug : https://bugs.launchpad.net/ubuntu/+source/telepathy-gabble/+bug/746973

Please try this and make us know if it works :

1/ Open Firefox and connect to https://www.facebook.com with your facebook account
Go into the firefox Edit menu and click on Preferences -> Advanced -> View Certificates
Scroll down to DigiCert section
Select "DigiCert High Assurance CA-3"
Export as "X.509 Certificate (PEM)" to /tmp/DigiCertHighAssuranceCA-3.crt

2/ Open a terminal window
sudo cp /tmp/DigiCertHighAssuranceCA-3.crt /usr/share/ca-certificates/mozilla/DigiCert_High_Assurance_CA-3.crt
sudo dpkg-reconfigure ca-certificates
select the new DigiCert_High_Assurance_CA-3.crt and press space on it
validate with OK
disconnect / reconnect empathy, the certificate doesn't show anymore.