Custom Error and Access denied pages in Sharepoint
By Anatoly Mironov
Unfortunately in SharePoint 2013 the custom error pages are not applied: link 1, link 2. Hopefully there will be a hotfix that solves it.
Comments from Wordpress.com
ryan - Mar 5, 2014
I agree, I have seen a few about. Thanks for the post
Jon - Mar 2, 2014
I have seen a few blog posts about this, it is a common dislike about 2013. Nice post.