I'm currently seeing this in the PHP error logs:
Fatal error: Uncaught exception 'Craft\\HttpException' with message '' in /home/vagrant/htdocs/site/craft/app/controllers/TemplatesController.php:59\nStack trace:\n#0 (): Craft\\TemplatesController->actionRender()\n#1 /home/vagrant/htdocs/site/craft/app/framework/web/actions/CAction.php(109): ReflectionMethod->invokeArgs()\n#2 /home/vagrant/htdocs/site/craft/app/framework/web/actions/CInlineAction.php(47): CAction->runWithParamsInternal()\n#3 /home/vagrant/htdocs/site/craft/app/framework/web/CController.php(308): CInlineAction->runWithParams()\n#4 /home/vagrant/htdocs/site/craft/app/framework/web/CController.php(286): CController->runAction()\n#5 /home/vagrant/htdocs/site/craft/app/framework/web/CController.php(265): CController->runActionWithFilters()\n#6 /home/vagrant/htdocs/site/craft/app/framework/web/CWebApplication.php(284): CController->run()\n#7 /home/vagrant/htdocs/site/craft/app/framework/web/CWebApplication.php(141): CWebApplication->runController()\n#8 /home/vagrant/htdocs/site/craft/app/etc/web/WebApp.php(288): CWebApplication->processRequest()\n#9 /home/vagrant/htdocs/site/craft/app/framework/base/CApplication.php(185): Craft\\WebApp->processRequest()\n#10 /home/vagrant/htdocs/site/craft/app/index.php(62): CApplication->run()\n#11 /home/vagrant/htdocs/site/public/index.php(19): include()\n#12 {main}
I have a _404.html template under templates/ and the errorTemplatePrefix set to _.
