When I started using MovieLens (quite some time ago) I was perpetually surprised by the uncanny accuracy of predicted ratings. Now, 1153 ratings later, it seems the predications are almost never correct, to the point of being opposites. A two star prediction means I'll love it. Five stars and I might hate it.... Has something been drastically changed about the way the prediction system works?

I've read other user comments concerning predictions which mostly relate to their mood and everyday viewing preferences. I'm not at all concerned with viewing habits but if the predictions are so askew that I can't trust them at all, there seems little point in adding ratings of my own.

I have no idea how the algorithm works but I would hope that after more than a thousand ratings it could get some vague sense of what I might appreciate.