that's because the picture is accessed through https, that is, an encrypted channel. When you get something through an encrypted channel you have to be sure that at the other side there is reallly the person you want to talk to, to prevent someone to get in the middle of the conversation. This check is done via a certificate. So what happens is that companies that want a secure site go to a company like Verisign, and ask for a certificate. Verisign checks that the company is what it claims to be, and certifies the identity of the company. When you connect to the site you get the certificate, and you can be sure that you are talking to the right person. Well, this cerificate expired. In short: no, it mostly isn't a problem, but luckily the same picture is available on a non encrypted channel. Just replace https with http: