Is anybody having display issues with the latest Kubuntu ?

[kitepilot at kitepilot.com]

At first I thought: "well...   Those #$&% Nvidia drivers..."
But then I saw it happening with ATI boards.
Anecdotally I can say that I have seen it happening in just about each and 
everyone of the 15-something computers (desktops and laptops) that I have 
installed Kubuntu onto. 

And it SUCKS...    :( 

Mostly with Firefox, but also with Konsole and other applications, suddenly 
the display inside a particular window quits (it goes black)...
After resizing it a random amount of times (but mostly after shrinking it) 
the display comes back alive and well. 

Keyboard and mouse input are taken (at least some times) cuz you can see 
some reactions after the display comes back, but it is ungodly ANNOYING!!! 

Is anybody experiencing something like that, or is it the little gnome 
following me again with the camera and laughing at my expenses? 

I mean, it would be funny...
If it wasn't happening to me...   :(
ET