Safari can't verify identity of the website "www.macosforge.com"

[David L Ballenger]

When logging into MacPorts and being redirected to www.macosforge.com  
I get the error in the subject line.  It says the certificate was  
signed by an unknown certifying authority.  According to the  
certificate details it was issued by opensource.apple.com.

I'm running Safari on a MacBook Pro running Mac OS X 10.5.1. I would  
hope that this system would have the latest set of authority  
certificates.

Is this a problem on my system?  Is opensource.apple.com not the  
correct certifying authority or should I just tell Safari to accept  
certificates issued  by opensource.apple.com?

Thanks -David