I also experience flickering, but in other way. (KS as a part of CIS 6.0)
Open KS.
Hide it behind other window or application (for example web browser) - this is not required, however UI refresh events should not tamper with overlaying windows.
Open start menu (I use XP) and go into its hierarchy - now we will see that KS refresh events will cause menu start to flicker. The worst flickering I see in browser’s address bar drop-down (Opera) - it makes inline address bar searches almost unreadable.
If KS is minimized or refresh is paused there are no such artifacts.