Version:           unspecified (using KDE 4.4.5) 
OS:                Linux

I'm using the science screensaver (bowl wandering on a screenshot of the screen), but when a notification pops up (for instance amarok changes songs, and uses knotify to display a notification), the screens turns black BUT the bowl of the screensaver uncovers it. Its a bit hard to explain..

Reproducible: Always

Steps to Reproduce:
Find away to trigger notifications from knotify regularly (every 2 minutes for intance). The easiest way is to configure amarok to use knotify and to launch a playlist

Configure the 'science' screensaver to trigger after 1 minute (just not to wait too long). I'm using sphere mode but i think all the modes do the same.

Wait for the screensaver to start. It should work.

Wait until amarok changes song and displays a notification via knotify.

Actual Results:  
The screen should turn black but the scrensaver goes on, slowly uncovering the previous screenshot.

Expected Results:  
The scrren should not turn black.

widget style: Kaleban but also happen with other styles.
Using up to date Debian squeeze with radeon free driver with kms, kernel 2.6.32, KDE 4.4.5, french locale.
 Also happens on another laptop with Linux mint 9 Kde (Ubuntu 10.04), kernel 2.6.32, fglrx, no kms, KDE 4.5.0, italian locale.