Can I ask you why you replace all URLs on the board with a redirection URL?

I don't follow - not all users are replaced with a redirection URL. URLs are rewritten to static urls, as spiders have a better time indexing them, when it's properly done.

Sorry, I meant URLs posted in a topic i.e. http://communityseo.com/forums/ipb_seo.php?url=THE_URL

This was a feature requested to try to ensure all pagerank is retained within the site - it is an optional feature too (you can enable or disable it).

If enabled, all outbound links are filtered internally through the site, so all links appear to lead within the site.

A beneft to using this feature, however, is that all outbound clicks are logged, along with the referrer. For anyone truly interested in watching their member activity on the site, they can which member's are clicking out of the site, from what topics, and when. The IP, date, and member name are included along with the outbound URL, and the referrer (page they came from)

Well this won't stop pagerank loss. Only using the rel="nofollow" attribute on the outbound link will do this, the search engine will still follow the link, does the redirect handler use any specific redirect headers? Such as 301, 302..?

Pagerank is so iffy, it's hard to be sure what does and doesn't stop it from spreading.

You are correct about the nofollow attribute - that will instruct bots that you are not vouching for the link they are following. Our software has the option of adding rel='nofollow' to all external links as well.

For the outbound filtered links, we send a 302 header. For internal redirections we send a 301 header.

If you view source here you can see rel='nofollow' added to the outbound link, but not the internal link

http://communityseo.com/forums/forums.html
http://someothersite.com/somepage.html

Can you answer whay don't you add nofollow to the internal page?
Is not it better if the "Juice" is not leaked to less important pages?

Why would you not want to pass your pagerank around your own site though? People abuse the nofollow attribute way too much - if people didn't link to each other on the internet, how would search engine spiders ever find out about other sites, and know which sites thought their content was worthwhile?

If you add nofollow to your OWN links, you're basically telling a spider "I can't vouch for this link", but it's on your own site?

agree, but consider this ...

do you want the pages with user profiles to rank good?
do you want lofi pages to rank good?
do you want search & help pages to rank good?

I would rather "retain rank" on index, category, forum, topic pages ...

don't you agree?

Yes, I understand why you wouldn't want those pages to be ranked higher. CommunitySEO, in fact, allows you to block search engines from indexing lofi (either by giving an error, setting nocache/nofollow tags on the lofi links, AND/OR redirecting to the full version of the content). You can block other areas through a robots.txt file too.