Why would the BBC web site always ask for a personal certificate, and how do I avoid giving it away?

After installing a CAcert personal certificate, every time I land on the BBC weather site it asks me to identify myself with a certificate.

Why would any non-malicious web site do that unless I’ve requested to sign in first? The weather … Continue reading Why would the BBC web site always ask for a personal certificate, and how do I avoid giving it away?