I have having a strange problem that I cannot find the cause.
In the WordPress admin when I click in Appearance->Menus I get an Internal Server Error on the main site (http://risd-sculpture.com) of a multisite installation. I am NOT getting this error on any of the other sites running on this installation (e.g. http://twentyten.risd-sculpture.com). All the other admin menu items work on the main site and all the other sites.
PLEASE READ THIS. I have de-activated all plugins and the problem persists. And I have re-installed WordPress 3.04
I recently upgraded to 3.04. This was not a problem with 3.0 or 3.01.
These are the active plugins.
jQuery Lightbox For Native Galleries
WPMU DEV Update Notifications
WPMU DEV Domain Mapping
On http://risd-sculpture.com the screen stop rendering at the menu, so only the header shows. When I set debug to true I get no errors. I have now commented out the wp_nav_menu function and all the screens render but without the menu. This a child theme of TwentyTen and strangely http://twentyten.risd-sculpture.com and http://twentyten.risd-sculpture.com/ (another child theme of TwentyTen) work fine, with their 3.0 menus.
I have been very thorough in my trouble-shooting as well as searching for answers in the forums and online but am now stuck. I would really appreciate some suggestions.