OK, this has been a problem through several major updates. Issue 1: /scoreboard objectives setdisplay sidebar <name> does nothing with most objectives. I have 20 objectives set, and only 2 will display in the sidebar. ALL objectives display correctly in the other slots, belowname and list. Yes, I have made sure that an online player has at least a score of 1 in each objective. For the sake of completeness, here is a list of objectives http://pastie.org/9188186 Switching the server to vanilla minecraft solves the issue, but I kind of need it to work in bukkit. Issue 2: Players with names longer than 12 characters do not display correctly in the scoreboard list slot, as noted in the screenshot. I have not tested whether this occurs in vanilla. Please only respond if you have solid information. Thank you for any help you can offer.