The checkbox is enabled but I have no icon to tell me about rares elites.

There's never been an elite icon (I'm working on that). It should be showing the minimap star icon on rares and rare-elites, as long as you don't have level text enabled (because level text contains that information already).

(edit: also, there will be a way to move it and show it with level text in the future)

Came here to ask for an elite icon :) I keep charging into a group of elite mobs, not realizing they are elite. And dying :D

Actually, i'm not seeing rare/boss icons either come to think of it, and I don't have level text turned on.