Back in July 2011 I noticed a problem with the Jetpack plugin and page navigation. In short, with the Jetpack plugin activated page navigation worked only if I was logged-in as admin. When logged-out page urls were being incorrectly re-written and causing 404 Not Found errors.
Now, some 9 months after having first raised the issue over at the WordPress.org forums member Josh Eaton seems to have found a possible cause.(more…)