Firefox not connecting https sites

[Jim]

FC10/ KDE
Firefox was having problem of connecting to the below site. But it had 
no problem of connecting mozilla.org, but it had problems of connecting 
to addons site below.
I check the Firewall settings and found that "Trusted Services"  WWW 
(HTTP) was not checked, I checked it and Apply. and now I can goto 
addons site, but first I have to add the /en-US/ in URL because the box 
that I'm having problems on Firefox-3.0.2 would only show a 
https://addons.mozilla.org/firefox/browse/type:7 and it wouldn't put 
the  /en-US/ in URL.  Correct URL is below.
Firefox-3.0 from another box (FC 8) would have no problems injecting 
/en-US/ in URL

https://addons.mozilla.org/en-US/firefox/browse/type:7

Any body experience this problem in FC 10 in Firefox-3.0.2 ???