This seems to be an old problem that we also had before the merge. Do you still have the problem now or did the textures load after some time? I'll try to dig out some posts from the old forums for relevant information.
zurion it happens to me when i use the teleport npc or the teleport with the blue crystal. and it never disapear if i dont quit the game and login again(doing logout dont work too its only when i exit/quit... means the same).