Version:            (using KDE 4.3.4)
Installed from:    openSUSE RPMs

I've got two computers with persistent repainting problems.  Not sure if this
is a KDE problem or an X.Org problem.  Both machines are x86-64 systems running
openSUSE 11.2, KDE 4.3.4 (though the problem has occurred with all KDE 4.x
versions), and X.Org 7.4, all installed from openSUSE 11.2 RPMs.  However, they
have different video cards:  in one case an Nvidia Quadro NVS 140M (using the
proprietary nvidia-gfxG02 driver) and in the other an Intel 965 GM (using the
"intel" driver).

Reproducibility: Usually, but not always

Steps to reproduce:
1. Hover the mouse pointer over something which causes a tooltip window to pop
up.  This could be something in the KDE panel (like the task bar or system
tray), or a web page link with a "title" attribute in a web browser.
2. Move the mouse pointer off the widget.  The bug can be more reliably
reproduced if this is done by using the mouse scroll wheel to scroll the window
contents up or down.

Observed behaviour:
3. Either:
  a) Once the mouse pointer is moved off the widget, the tooltip window
disappears, but what's underneath gets repainted with a solid colour or the
desktop background.
  b) Once the mouse pointer is moved off the widget, the tooltip window
disappears, and what's underneath gets properly repainted, but some other area
of the screen suddenly gets painted with the desktop background image.
  c) Once the mouse pointer is moved off the widget, the tooltip window
disappears, and what's underneath gets properly repainted.  However, the next
time a tooltip window is created, some other area of the screen suddenly gets
painted with the desktop background image.