With a bit more experimenting, the problem is only on my home page. I can use the menus on the left to get to any forum, etc. If I hit the home icon or the ATP header, I get the following error.
Not Found
The requested URL /provisioning/index.php was not found on this server.
Apache/2.2.15 (CentOS) Server at allthingsplants.com Port 80
I checked that I am logged in, going to my mail works and recognizes me. Hope this helps, sorry to mess up your Sunday
@Dave
