WordPress version: 3.4.1
WordPress SEO version: 1.2.7
I did this: Unchecked Permalink option, "Redirect attachment URL's to parent post URL."
I expected the plugin to do this: No redirect of post attachments to the parent URL.
Instead it did this: Plugin CONTINUED to redirect post attachments to the parent URL.
Problem is that the following Option is NOT unset in the database when the checkbox is deselected:
wp_options\wpseo - s:18:"redirectattachment";s:2:"on";
Workaround is to edit the "on" value to "".