KDE forgets refresh rate

[Lutz Lennardt <lutz.lennardt@onlinehome.de>]

I configuered the X server to work with a refresh rate of 60 Hz.

KDE "forgets" this rate and always starts with a refresh rate of 75 Hz.

Even if I change this to 60 Hz, X under KDE starts with 75 Hz again. 
This does not happen under Gnome.

Any hints?

Lutz