Plasma user here. After the update mouse cursor and moving windows around is not smooth anymore. If I would have to describe it feels like vsync is running with a different refresh rate then the screen or something. Screen is 75 Hz, it's smoother when I turn it down to 60 Hz. Not a huge issue. But a bit annoying.
Some more info. 7840U with Radeon 780M.
Edit: Booting 6.11.7-308 has resolved the problem. I will do some more tests to see if it was just a temporary problem or the kernel is making the difference.
Edit2: Booted two times 6.11.7-309 and two times 6.11.7-308. 309 is not smooth, 308 is smooth.