Your trust score is only viewable in the marketplace, mining, trading discussion and altcoin discussion sections. You will also see it if you are viewing their profile and in your PM's. If you are looking at someone's posts in any other section then you will not be able to see other's trust scores.
Note to self: Bruno needs to get out more. Thanks, all. (even though I swear I've seen it in Discussion most recently)
EDIT: I guess I was mistaken upon doing a cache search and seeing nada on the 22nd.