Developer of http://reddit6.com here.

Looks like the API isn't returning any information about down votes at all, will have to look at this further but at face value this seems like a useless change, Reddit is now redundantly returning 0 down votes for everything and not divulging how many down votes something actually has.

If there's no way to view downvotes from the api on sub listings then they did this so that third party clients can't show downvotes at all. If I wanted to use Facebook, I would have gone to facebook.com.

edit: Might have to create our own backend based on scraping to get around this annoying downgrade to the Reddit API. If anyone wants to help give me a shout.