I have resolved a problem that stop my browser (mac osX 10.4.2) safari explorer opera firefox when I attempt to access a secure page.
Th soluce was easy:
The intego net barrier firewall disconnect thees pages when the filters are set to exlude the banner containing the string \"adserv\"
this srtring is a part of the url of the page
I disable only this line in the banner filter and it is ok
I Hope it will help a few mac user