KDE Konsole

I've been a happy KDE user since the eary days of it.
I've also used Konsole as my primary terminal application, but in recent Kubuntu releases it became slow.
Yesterday I switched to good old xterm with screen:

xterm -bg black -fg grey -fn -*-console-*-*-*-*-*-*-*-*-*-*-*-* -geometry 166x45

and in xterm I start screen with 10 sessions.
Now everything is fast again. :)