Does duplicate content on word press work against the site rank? (not page rank)

[tommr1]

I noticed in the crawl that there seems to be some duplicate content with my word press blog.

I installed a seo plugin, Yoast's wordpress seo plugin, and set it to keep from crawling the archives.

This might solve the problem but my main question is can the blog drag my site down?

[iAnalyst.com]

If i understand this correctly you have a regular web site and separately a wordpress site on another domain?  If so then taking content from your site and posting it on the other wordpress site can hurt your wordpress site. It shouldnt hurt your site as long as Google spiders your site first and you have better link popularity.

[tommr1]

I have a regular html site with a word press blog attached so all of the url's start with our domain name.

[iAnalyst.com]

Oh I see so its on your sub domain. Then yes you would not want to repeat the same content that's on your main domain on the blog. It's duplicate content within your own site.

Your best bet is to post unique content to your blog.

[PeterAlexLeigh]

Does your blog actually contain duplicate content from your website or are you saying that the Moz Crawl is identifying some of your blog pages as being duplicates of other pages inside the blog?

It happens to one of our sites due to how the tagging works, but I've never really thought anything of it.

Is this the seo tool you're talking about? http://wordpress.org/extend/plugins/canonical/

Also have you read this article http://www.seoresearcher.com/how-to-make-your-wordpress-blog-duplicate-content-safe.htm