De Mozilla :
"SSL received a record with an incorrect Message Authentication Code."
This usually indicates that the client and server have failed to come to agreement on the set of keys used to encrypt the application data and to check message integrity. If this occurs frequently on a server, an active attack (such as the "million question" attack) may be underway against the server.
Outra sugestão é garantir que o relógio e o fuso horário no cliente e no servidor estejam corretos. Talvez tente sincronizar com um servidor de horário.