I have only had this issue today. Characters (other players, NPCs, hostiles - anything) simply don't load when I enter new areas unless I force the game to redraw them with the /reloadui command. Except for hostile NPCs, who are still able to attack, register on the compass or play sound effects in spite of their invisibility. If a player logs in or appears in my area after I log in or reload, that player also never renders. It's like it's not checking to see if there are character updates at all.
I've tried repairing my installation. Specs aren't relevant as I play it between two computers. One machine is a lowly branded computer from Best Buy, the other is a custom built monster with two graphics cards. It's possible that it's network latency, but all the other symptoms simply are not there, and no matter how long I wait for other characters to load, it just never happens.
Edited by DissidentRage on 4 May 2014 23:32