I've seen some similar issues strewn throughout Google's results about this, but none seem to be corporate-specific.
I continually get the 'This connection is untrusted' screen every time I attempt to log into a secure site...for instance Gmail.
This is pretty annoying as sometimes I have to go through the process of adding the exception two or three times before it finally lets me into Gmail.
I am behind a corporate firewall, going through an internal proxy server to get to the Internet, so there is no possibility for me to update the firewall...etc.
Does anybody know a way around this? Can it simply be disabled (and is that safe)?
I'm going to reopen this question with a bit of new information.
I have been using Google Chrome lately until today, and one thing that I noticed was that I never had this issue when using either Chrome or Internet Explorer. Is there something that these other browsers do that I need to manually do in FF?