Doing that, I noticed a long-time poster making the point that the community has changed and asking if anybody else has noticed it. So I said yes, it has changed, and quite a bit.
The reward for my comment was several downvotes. As it turns out, his comment was part of some Rand thread. My comment was viewed as supportive of his position, so I was punished. Everybody who took one position was getting upvoted, and everybody who took another was getting downvoted.
Now was that what really happened? Or was my comment simply empty and a pointless waste of bandwidth? I honestly don't know. All I have is up and down scores to go by. So for all of you who think the up-down arrows enforce community behavior, I have a simple question: how can the community push me to conform when I don't know if it's giving me a "we disagree" or a "poor quality" message?
I know I can (and have) made the same comment in other discussions and actually got voted up, so I don't think the quality of my comment had much to do with it. It looks a lot like context and opinion matter the most to me. Probably also the time of the week and time of day.
In short, the voting system is broken. A lot.