Yes. We are having the same error - Google Webmaster tools claims the page is unreachable. Occasionally I'd get a message that it was redirected - which it is to our mobile site, if you come in from a phone.
If I disable this plugin, everything from SEO/Google looks great, but, I lose my formatting and I start getting random widgets all over the rest of the site.
We're using .57 of this widget and 4.0.1 of Wordpress.