Tracking down rel="canonical" on Wordpress site

[robandsarahgillespie]

A rel="canonical" is being added to every page and post on my Wordpress site - not tag results, not category results.  Not a major problem, right?  Except that I don't know where it's coming from.

I've tried tracking it down - change the theme back to a default one, turn off all the plugins - it's still there.  Is it coming from .htaccess perhaps?

The only issue it is causing is that it has causes me to have to turn off the canonical option in Platinum SEO  as that was resulting in two identical rel=canon on each page.

It doesn't seem to be causing problem but I'd like to get a better understanding of what it going on.

[DonnaDuncan]

The canonical might be being added by your theme.

Check out this post (http://www.featheredowl.com/wordpress-duplicate-canonical-link-element/). Read the comments. The post is from 2010 but don’t let that deter you. It could very well be the solution to your problem.

[robandsarahgillespie]

Thanks Donna,  I've already tried switching back to the default theme and no difference.

However your link does show that Wordpress itself adds the canonical link to every post and page by default so that'll be where it's coming from, rather than the theme.

Thanks.