I cant go to facebook...when ever am putting my id and password, there is a message showing like this...

This Connection is Untrusted

You have asked Firefox to connect
securely to http://www.facebook.com, but we can't confirm that your connection is secure.
Normally, when you try to connect securely,
sites will present trusted identification to prove that you are
going to the right place. However, this site's identity can't be verified.



What Should I Do?

If you usually connect to
this site without problems, this error could mean that someone is
trying to impersonate the site, and you shouldn't continue.

is facebook having any problem? is this problem happening only with me? can some one tell whts the problem?