I've got the 550D with ML 2.3 running just fine. I've updated by old ML installation *just now*.
I can't get stack focus to work. When I highlight "focus end point" it says "SET: change value" but pressing SET does absolutely nothing. "ZoomIn+L/R" I don't quite get what that means. I suppose ZoomIn is the round button topright on the back of the camera, but what's L/R mean?
Anyway, just to be sure I'm not missing anything, I went ahead to "Rack focus" with a little yellow triangle next to it. It says "SET: run action". So I press SET and there it is! Nothing. Also, "Trigger mode" is set to "Press PLAY". Assuming PLAY is the button to switch between camera mode, and image viewer mode normally, that's what it still does, so that doesn't work either.
What's going on? I'm sure this has been used by someone at least, so how come I can't get it to do anything?