For some reason the Dell panel I have on my docking station at work doesn't quite work properly with my Dell laptop. Although I set the default to have a 75 Hz refresh rate, every time I dock, it resets to 65 Hz and slightly fuzzy, so I always have to go in to the properties and redo it, at which point there is zero flicker and everything is pin-sharp! Gorgeous.

Probably just a M$ issue which I can't be bothered tracking down.