I tried to look for the existing threads and couldn’t find any relevant info.
When I turn on browser caching through W3 Total Cache, It is suppressing one of the dropdown submenu items in the main navigation menu, it is also rearranging the menu items.
This seems to be happening only in Chrome and Safari. It looks fine in Firefox.
That’s weird – have you checked with the caching plugin support? GP is using regular WordPress menus, so I’m not sure what the plugin is altering that would break that core functionality.