Thank you devil, I can do that. As you point out both Yakuake and Konsole work just fine, so the Root Terminal is not needed, it is a convenience of sorts. I decided to report only so that you might know that something might not be quite right.
I just start up siduction and log in as any normal user might. I next click on Application Menu. Then I go to System. From there I click on "Root Terminal" on the list of applications. It asks for my root password. I do that and I am running the Root Terminal. So I do something, let's say "apt-get update" and I close out the terminal. Now if I try to open that terminal again my screen flickers very briefly but the Root Terminal application does not launch. I cannot launch it again unless I either log out and back in or I restart 15.1. Either one of those clears the problem.
OK, so let' go back to that icon and click on "edit application". If I go to the "application" tab I see:
"gksu /usr/bin/x-terminal-emulator"
I do not program or write scripts at all, but might that command need something that is not there?
If the Root Terminal app & icon were not worth fooling with that would cause me no problem. Either Konsole or Yakuake works just fine, really.
So this is a small problem. In my short experience thus far with 15.1 the big things are quit right! Thank your colleagues for me.