SORTER refuses to hide when I open Lightroom3 (and, yes, I have configured it so to do in Preferences). I am using DevonTHINK Pro Office v.2.3.1.1 on a Mac.
I hope I have managed to solve this. I had added Lightroom twice to the list of hidden applications and this confused the poor beast. It has now disappeared.
Sorry to have bothered me.
Monty