ponyboy96 - 3:21 pm on Mar 15, 2010 (gmt 0) [edited by: tedster at 3:42 pm (utc) on Mar 15, 2010]
So if I have .examplw.com redirect serverwide to it's www.example.com I am loosing PR?
According to this, yes. But that's still better than a canonical/duplicate site issue.
I've had the unfortunate experience of having to implement thousands of 301 redirects (mostly Apache rewrites) across a single site after a platform change. From my experience, yes, the 301s did result in the pages losing value and rankings. It took almost exactly 1 year for all of the link value to return back to the site which resulted in rankings and traffic returning. I really would not recommend having to do this.
The best practice here is to try to avoid rewriting URLs if at all possible when changing platforms/CMS systems. Spend the extra coin or take the time to ensure that your URLs are the same. The only exception here, is if you are going from really bad URLs to much better URL structures. Only then may it be worth it.
[edit reason] switch to example.com in the quote [/edit]
[edited by: tedster at 3:42 pm (utc) on Mar 15, 2010]