i uninstalled libgdkxtf, and the problem persist. KDE not work with gtk,
i think that libgdkxtf modifies some configuration or some fonts.
what libraries load a KDE app when it starts??, i run kdebuildsycoca and
it delay some seconds too.
i use debian and i have test running X as root, and as a user, i have run a
xterm and a kde or gnome session and the problem is the same