remove duplicate content

[miracle]

I run a forum using Invision Powerboard, when I did a search for site:www.exampleforum.com/lofiversion it shows 3 pages of content based on the lo-fi version. I added a line to block spiders from accessing the "lo-fi version folder" some months after I opened my forum.

Will having those lo-fi version results hurt and how do I go about removing those lo-fi version?

One last question: My forum url used to be example.com/forum/ a month later, I purchased a domain, exampleforum.com. I added a redirect, www.example.com/forum to www.exampleforum.com using Cpanel Redirect method which added a line to .htaccess file.

#####
RedirectMatch permanent ^/forum$ http://www.exampleforum.com
#####

Is this good? I heard about using 301 or 302 redirects which is better?

Also, google still shows the result www.example.com/forum when I searched for site:www.example.com/forum Should I be worried? Basically, I want google to delete all the results as www.example.com/forum/

Hope someone can help me, thanks a lot. :)

[edited by: tedster at 10:20 am (utc) on Nov. 16, 2006]
[edit reason] use example.com [/edit]

[g1smd]

>> RedirectMatch permanent ^/forum$ http://www.exampleforum.com

>> Is this good? I heard about using 301 or 302 redirects which is better?

You need a 301 "permanent" redirect. That is what you already have.

Only the URLs that return content as "200 OK" will be indexed.

The URLs that redirect will drop out of the index, but may hang around as Supplemental results for a year.

That is no bad thing, as anyone using old URLs to access the site will be redirected to the new URLs for that content.

Google will drop the old URLs in their own time.