What is the secret handshake to change my login shell in KDE?

I remember when I changed it from Bash to ksh, it wasn't easy. KDE was adamant about using Bash and it fixed itself in some way I never understood. It just did and I shrugged it off.

Now I want to change it to tcsh. I ran 'chsh' and selected /bin/tcsh. I also checked it with kuser, in the Konsole settings and Yakuake. Everything seems correct. But KDE insists on making ksh my login shell. I have logged out/logged in three times. I rebooted the machine twice. My login shell still is ksh.

Tcsh works fine if I call it after I am logged in. Or I can force a CLI login on KDM, and it works fine: my login shell is tcsh. But as soon as I am in KDE, all console apps have ksh as login shell: Konsole, Yakuake, Xterm and rxvt. Where does KDE hide that secret? Or is Ubuntu playing hide-and-seek with OS features again?

Did you try to change it in /etc/passwd?

Well, it's fixed. I don't know how. I clicked and tweaked a lot of things, one of them eventually worked. And it worked right off the bat on the second computer. I just have no idea what happened. Sorry. And thanks for all the attention.