Gone Fishing?
Euan Williams Users of Firefox and Chrome should check for the latest updates which have been issued in the last few days.)
Safari users should be "aware", and may want to check their Keychain Access preferences, see below.
Site certificates from Comodo (an issuing authority) for
login.live.com
mail.google.com
www.google.com
login.yahoo.com
login.skype.com
addons.mozilla.org
were compromised, but the stolen certificates have been revoked.
Comodo comments:
Comodo comments
Here are two discussions:
MacWorld comments
Intego discussion and instructions