d3x: But I'm losing a few all important virtual pixels!
I have "focus follows mouse". If I move a window, it looks fine. Then when I move focus to another window, the previous window gets the transparent strip.
And, strangely, Konqueror and Konversation windows suffer the problem. Konsole appears to be ok. Strange that not all windows have the same treatment. btw, Intel graphics card.
If it's not already a known issue, I'll post to bugs.kde.org.