Blog display on localhost ok, but not from remote client

SITE: http://pgm.homelinux.com/MBS

When accessing from localhost on the server (debian 5.02, apache2) the blog display is good. But from a remote site the formatting is gone. Looking at the source, I see the url is like “http://localhost….” and I think that’s where the problem is. Shouldn’t that be a relative url not an absolute one? When I look at egroupware, the url’s are relative.