Comment 12 for bug 95241

I just tried Allan's suggestion and changed the user-agent string in Windows firefox to the Linux firefox user-agent string which replicated the problem. Changing the user-agent string in Linux firefox to Windows firefox user-agent string fixed the problem which means that the problem is the proxy-server itself.

I then played around with the user-agent string and this may seem strange but whenever I had the "ist" string combination in the (for example "Ubuntu-feisty) the proxy server would fail. I inserted ""ist" into ubuntu-edgy and internet explorer user-agent strings and I get the same error.