This happens on one of my users Mac laptop running ML or Mavericks. When she accesses https://www.somewebsite.com using either Chrome or Safari, she always got the warning related to the certificate and Chrome gives her the red cross beside the word "https". But when we viewed the certificate information, it says the certificate is valid and verified by Thawte DV SSL CA.
It does not happen to my machine or another machine I tested. It does not happen to Firefox. Chrome is updated. We tried resetting Chrome and clearing all browser data. But it did not help.
I feel like it's something to deal with the Mac OS Keychain. I tried downloading my cert and have her import to her Keychain but that did not help either.
Any idea? Thanks much!