7640520 - Site Message Should Return 500
When a page threw a site error, it originally did not return an error on the http protocol which was problematic for SEO reasons. If, for example, Google went to your item page and got the error, it could potentially log your site as the error page. Now, with the error page being noted as 500, it effectively tells the web browser 'the server had an issue that we are resolving; please return later.'