There's no need to send anything to email@example.com
, as the same people who respond to linux-bugs respond here (including me).
I don't see anything in this thread to suggest that this is an nvidia driver bug. This sounds like a KDE bug, especially if its not present anywhere but in KDE/qt based applications. If I run a konsole and gnome-terminal side by side, with the same font, and dmesg in an infinite while loop, there is noticable and significant lag only in the konsole window. If there was a driver bug, I'd expect both windows to exhibit the same latency.
Has anyone submitted a bug to the KDE developers?