Not sure if this is the problem, but if you go into your Clearspace Admin console and select the System / System Properties view, what is the value you have for your jiveURL property? Is it pointing at localhost?
When I first set Clearspace up, I noticed some general weirdness like this when viewing documents.
Just something to check...
Did you manage to resolve this issue. I setup clearcase evaluation copy for my team however users are unable to navigate certain links since URL defaults to localhost instead of hostname.
I am unable to change URLs from admin console.
When you say that you are unable to change URLs from admin console, what exactly do you mean? You should be able to login to the admin console and then go to System --> System Properties. Look for the system property 'jiveURL' and change that to be a value that all your users can see, not 'http://localhost:8080/clearspace'.