Part of the problem is that "save" and "upvote" are the same thing. I am an obsessive bookmarker, so I "upvote" stuff all the time, without reading the article, just because the title strikes me as sufficient to into "Hmmm, look at this later" territory.

If there were a "save" feature (ala Reddit) that was separate from upvoting, I think that would help. Or maybe I'm the only one who does that and it wouldn't matter a bit. :-)