GUI won't let me open files as "Open as Administrator" if logged in as another

[Vera]

Thanks [member=6629]ralphy[/member] and [member=5916]trinidad[/member] for so ably answering my question about the background behind this. OK, so it seems that this is due mainly to historical reasons that it is set up like that for custom admin actions via Thunar.

Thanks again ralphy for UnlockMe - I think that will be a real asset to my multi-user machine.