Hi, I've recently gotten a couple errors on our prod server (but not on our dev server):

1.) •   Bad class to singleton() - SiteTree
Line 275 of Core.php
•   singleton(SiteTree)
Line 2461 of DataObject.php
•   DataObject::get_one(SiteTree,HomepageForDomain REGEXP '(,|^) *[ip address] *(,|$)')
Line 64 of RootURLController.php
•   RootURLController::get_homepage_urlsegment()
Line 41 of RootURLController.php
•   RootURLController->handleRequest(HTTPRequest)
Line 277 of Director.php
•   Director::handleRequest(HTTPRequest,Session)
Line 121 of Director.php
•   Director::direct(/)

2.)•   Bad class to singleton() - SiteTree
Line 275 of Core.php
•   singleton(SiteTree)
Line 37 of ModelAsController.php
•   ModelAsController->init()
Line 16 of ModelAsController.php
•   ModelAsController->handleRequest(HTTPRequest)
Line 277 of Director.php
•   Director::handleRequest(HTTPRequest,Session)
Line 121 of Director.php
•   Director::direct(*)
Line 118 of main.php

I've read that the issue could be:
•   Multiple classes with the same name
•   The function is case sensitive and that the case of the class name and the class that's being called in the function might not match.
•   Need to dev/build
•   need to flush

I've tried all to no avail. Any thoughts?

Thanks,

Marko