Please be careful when accepting certificate updates as noted in the following security warning

http://securitywatch.pcmag.com/google/287010-fraudulent-google-com-certificate-in-wild

QUOTE: In early July, Dutch certificate authority DigiNotar issued a fraudulent SSL certificate for ‘*.google.com’. This certificate could allow a malicious web site, in conjunction with certain other techniques, to spoof any domain on google.com including mail.google.com.