I just saw this on the Diablo Fans forum and thought some of you might find it useful. Not sure how I would classify it since it does seem to be taking advantage of mobs getting stuck. The concern on the forum is only basically when Blizzard will fix it. I imagine Blizzard will fix it fairly quickly, so if you want to farm this get started on it now. 🙂 Yes, this still does work post-patch today (May 29th).
Anyway, either if you agree with taking advantage of pathing issues for mobs or not this can get you a bit of gold and, if you’re lucky, some decent drops. Have fun!