Why Firefox doesn't let me add an exception?

Firefox tells me that a site has an invalid security certificate, I know. It ask if I want to add an Exception and I click-to-add - on. It appears the Add Security Exception window and this window tells me that this site has a valid certificate and there is no need to add an exception; but I should add an exception and he won't do it for me. Why?
I work in a secure test lab and use Firefox to connect to our systems under test. Every time that we have change or add hardware to add exceptions to connect to a system. I did it for years with Firefox, but now Firefox 4 seems confused. We must now use AE, which I wouldn't have enough.


Tags: Firefox

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