KDE and Firefox

When a notification comes in on KDE, if I am scrolling a window in FF at the same time, the FF page goes smeared and unusable, and stays that way. Is this a known bug or something I can tweak?

I will post a screen soon… (I have to wait for a notification!)

At least I can not reproduce this bug here - I suppose this is an issue of the used GFX-card and -driver.

I think you are probably right G, i posted to see if I was alone in this.