Site has been functioning fine. However, yesterday I added a retina site logo image in the theme options. After that, the home page of the site on any desktop has not been visible to any visitors who are not logged in as users. Non-logged in visitors can navigate directly to any other page of the site i.e http://kelpdesigns.com/contact, but when they navigate to the homepage they see the white screen of death (no source code shows either). Non logged in users can still navigate to wp-adminn to log in, etc.
Everything performs fine for any logged in user on a desktop.
Any user can see homepage and all pages on mobile devices, but no logo shows.
I removed the retina logo, but the problem did not resolve. I changed the static front page of the site a few times and each time it is the same, that home page is visible only to logged in users.