In the popups opened by plasmoids (till now, I have checked in the folderview plasmoid (i.e. when the plasmoid is placed in a panel and acts a button to open a folderview popup) and in klipper) scrolling is very slow, and does not seem to follow the scrolling speed set in the 'input devices' KCM. In details view, one click of the mouse wheel moves about half the text height, which makes it very cumbersome to scroll using the mouse wheel. It needs to behave like the details view in dolphin, where it follows the number of lines per click set in the 'input devices' KCM, or at the very least, have a separately configurable scrolling speed.

I am unsure which componenet is responsible, so I have assigned this to general