In "Congratulations, A forum post you made in the thread..." messages, I've noticed that some links contain the "vintage" URL, and some contain the 'standard' URL. This is the case both the link to the thread, as well as the link to change your notification settings.
Maybe this is a result of the site that the person that quotes you is using? But in any event, it's inconsitent when some of these links take you to the vintage site, and some take you to the new site. Mods, by all means take a gander at my inbox if this isn't clear.
EDIT: to be clear, I use the new site exclusively.
Edited: 10/09/2015
at 11:57 AM
by barrels