One of the lesser talked about features introduced in WordPress 2.7 is the new feature that breaks comments into multiple pages to create faster load times. By default, this feature is activated and set to allow 50 comments before the break. The problem is, with this new feature activated, your WordPress blog is creating duplicate content.
Here is what I found while checking my Google Webmaster Tools account for this website:
Duplicate Title Tags
Duplicate Descriptions
Is this a huge deal? Probably not, but you may want to consider unchecking this box in your Dashboard > Settings > Discussion tab. Hopefully in a future version of WordPress this will NOT be checked by default and instead be an option.
Kyle Eslick
Kyle Eslick is the founder and primary author of WordPress Hacks. You can learn more about him at KyleEslick.com or you can follow his personal tweets here.
Thanks for releasing this version. 
As your site has a lot of widgets, so I think it will significantly reduce the server usage. 
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I saw it since I’ve installed WP 2.7 on my blog.
Not a big problem at all
The new release of the Platinum SEO plugin takes care of that.
yeah kyle ur right. This comment problem were happening with me too.I am also having duplicate content error in my webmaster account.
Hope wordpress will fix this problem … let’s uncheck this options for now ..
you can solve the problem very simple. just look at this code
http://tinyurl.com/8ekv8n
the post it’s written in romanian, but PHP is still php
So we will start to sacrifice another user friendly feature to Google?!. Well, I won’t. I’ve not created my site for this company but for humans. I know, my pages be less findable through this market dominating company but I simply don’t care.
People who earn their daily bread by being found through Google and then sell stuff of some kind might think different.
See here the transitional solution: http://blog.kaizeku.com/wordpress/prevent-wordpress-27-duplicate-content/
FYI: The wpSEO plugin is ready for this problem.
I wrote a short plugin that addresses this: http://pressedwords.com/solving-wordpress-seo-paged-comments-problem/
I never noticed any content duplication, maybe I’m not aware of it. I just unmarked it.
You are right that it is probably not a really big deal, but its definitely good to know. I might change those settings as you suggested. I was wondering if any plugins might exist that would help override the meta data on this. And now I see those plugins so I will have to try those.
I’ve written a short bit of PHP that fixes the issue of duplicate titles and meta descriptions. It uses the cpage variable:
http://www.malcolmcoles.co.uk/blog/avoid-duplicate-content-paged-comments-wordpress-27/
Hi,
2.7 Comment Pagination – you can solve the problem very simple. just look at this code
http://tinyurl.com/8ekv8n
Good one to watch.
Thanks!
You can also use the plugin provided here http://pressedwords.com/solving-wordpress-seo-paged-comments-problem/
So basically this is for blog posts which receive more than 50 comments, correct?
If so, i don’t have to worry. lol. But this is still good to know. Thank you for bringing it to our attention.
Missy.
This is a problem whether you have zero comments or 51 comments, I think.
On my site, I have multiple blogs. Only one has been converted to WP 2.7.
The dup content problem first appeared in blogsearch.google.com where multiple comments were displayed. Several urls indexed, say one for each comment! Not just that, Google’s indexing speed and ranking were instantly shot – new posts take 5 mins to get indexed, it became hours. Which led to me to explore what’s happening and landed here.
Have removed the pagination option from Discussions for now. Let’s see if things go back to normal.
The post I referenced above did not have anywhere near 50 comments on it, so I think this can be a problem regardless of the number of comments.
I think this comments scenario is a good case to implement “progressive enhancement” (good background article: http://www.alistapart.com/articles/understandingprogressiveenhancement)
Comments paginated into separate pages and use ajax to pull that content into the post page on demand.
Indeed. I realized this when I first upgraded, and quickly removed pagination.
Should be enough to disable the feature. It works without any other settings.
I’m trying to find the plugin that can substitute paged comment. I have tried WP Paged Comments (http://blog.2i2j.com) but it didn’t work on WP 2.7.
How about monthly archives, tag pages, category pages – they are supposed to be a nice problem for dup content as well.
I mean when you have the whole post shown on these pages.
Anyone experiencing any problems with dup content issues due to displaying your posts in full on tag, category and archive pages?
Yes, they are. That’s why a site should show only excerpted content on archives pages.
i have also problem with new version of wp. After that i have installed new version 2.7.1.
everthing is ok except commnets.
i get emty email. that i have to check . But in admin panel said; this comments couldnt found..
if I write self a comment and sent it.
i get this http://www.megahaber.net/comment-page-#comment-
and i see my home page..
i have done everthing. but i can not fix this problem..
can somebody help me?
Thank you
Best regards
Since I uploaded the Platinium SEO plugin I have noticed that I have stopped having this problem.