safari unable to visit https sites

Hi there,

I am unable to connect to https sites with safari and firefox. The connection times out. We've tried 5 different sites. Connecting to http: sites is fine. The error I am receiving from safari is ""Safari can't open "<<<URL>>>"
The error is: "unknown error" (NSURLErrorDomain:-1) Please choose Safari > Report Bugs to Apple, note the error number, and describe what you did before you saw this message.""

I followed these instructions and submitted a bug to apple.

This only is happening on the home network of the machine when visiting wireless networks at internet cafes then connecting to https sites with safari and firefox work fine.

I am able to telnet to port 443 of the same server from the OSX terminal. The firewall is turned off. There is no firewall in the path on the local network. There is no network sharing. We are using the builtin ethernet or wireless interface on the home network - neither work.

Creating a new user with the username test still receives the same treatment. safari and firefox work fine with http: sites but time out when visiting https: sites.

What else can I check?

Cheers,
Noah