Sientific Linux 6.0, KDE, windows became vague
I am installing Scinetific Linux 6.0 and trying to use KDE.
When I loaded all current updates, many old problems fixed,
but new problem appeared: after move of a window by mouse
the window content became vague. This especially strongly
affects xterm windows. Emacs is slightly affected too.
This is as if a fog consisting of a small one-pixel points covers all the text in a window and some system elements of the window border. Interestingly, the text in window is instantly restored, if I resize a window by a mouse, even for tiny change of size. However some icons in emacs are not restored at resize and the work is not expected to convenient enough.
I am using new Samsing RF511 i7 with NVIDIA video card.
Attempt to load the NVIDIA driver from their site has led to halt of a system at reboot. So I returned to inbuilt in SL "Noveau" free video driver and also some inter video driver.
Is there any way to cure this problem without changing an operating system? Some keyword in some config file? A command to refresh the windows? Anything else?
Thanks for any advice.