I updated to Firefox 8.0 and now I constantly get security certificate warnings without the opportunity to save the exception (these are coming up for Google, gmail, and many other normal sites that I visit regularly)

I cannot even save this as an exception, so it is driving me nuts. I have an Asus G74SXXT1 W 16 g of ram running Win 7 Pro Is there something I am doing wrong, this is driving me nuts and I never want to lose my love for Firefox...I promote it to all of my less experienced friends still using the Big E. Any help or to tell me where I f'd up would be greatly appreciated Thank you Larry Green