This link:
http://www.yoursite.com/forum/forum.php?referrerid=1
Code:
<a href="{vb:raw vboptions.bburl}/{vb:raw vboptions.forumhome}.php?referrerid={vb:var bbuserinfo.userid}">{vb:raw vboptions.bburl}/{vb:raw vboptions.forumhome}.php?referrerid={vb:var bbuserinfo.userid}</a>
is the proper link as it picks up the setting name of the file you are using for your home page. I just tested it again on my site and the name shows up properly. To test it again yourself, make sure you clear all your cookies and cache, and try it without logging in (as a guest would see) and it will show up like it is supposed to. You can not do multiple testings of it as it reads the cookie on your machine, even if you aren't logged in.