Once in a while I'm using the quick goto* links for some of the well known base maps (easier to remember than the full link with the item ID), e.g. http://goto.arcgisonline.com/maps/Reference/World_Transportation opens the related entry in ArcGIS Online Portal.
While this works great for most map services - it doesn't for http://goto.arcgisonline.com/maps/Canvas/World_Light_Gray_Reference . It seems a missing forward slash in the url is causing the the domain name resolution error. Feels like an registration/reference issue in ArcGIS online.
Maybe someone can look into this!? Thanks!