I'm using Tiger to connect to a web-based exchange e-mail server. It all worked fine until a couple of days ago, I now get the message

local security cannot be contacted

and I can no longer read my mail. If I use firefox it works just fine, if I switch local users and connect with safari it works fine. Rebooting does nothing, I've cleared cookies and passwords to no effect. No other mac users has this problem. Any suggestions??

Thanks
jon