BBpress member usernames

Hi, I’ve integrated bbpress into my site, but there is an error somewhere. When I view my site, the usernames on the forum with the ‘member’ link below is visible, but a member has complained he can’t see it. I’ve been to a local library, and was forced to agree, on that computer I couldn’t see it either. I use IE7 and Firefox for browsing, whereas the library is using IE6, if that should make a difference. What’s the problem.
Link here: https://www.tri-cornwall.org.uk/forums