Invalid Certificate on every secured website
Hi,
I've just updated to 10.7.4 with Safari 5.1.7 and after the update I'm always getting an Invalid Certificate for secured website.
www.paypal.com
every banking sites
etc
The content is not entirely loaded even if I click "continue".
I don't know if it related but I can't install any Extensions in Safari. I had ClickToFlash and 1Password and neither can be reinstalled after the update. I got a message telling me that the extension cannot be installed.
Thank you
MacBook Air, Mac OS X (10.7.4)