Right then, running Windows Vista Home Premium 64.
When Comodo firewall is installed, Freelancer will not join servers (that connection error occurs. I can see servers).
When it is uninstalled, I can join them.
I have reinstalled it twice, but to no avail.
If anyone here is using Comodo with Freelancer I would greatly appreciate any advice they have on getting it working.
Otherwise, it should be added to that connection guide you people have on the forums, as it took me ages to work out it was the firewall (closing it is not enough, you have to actually uninstall it).