A very minor quibble: In any of my grids when the items extend beyond the bottom of the visible area so that a scrollbar is shown for the grid, when I scroll the bar so that it is not quite at the top but a single notch (drag bar with the mouse or do a single downward click with the scroll wheel) down from the topmost position, when I then use Alt-Up or Alt-Down to move items around, some nasty up and down-scrolling will occur in the grid each time the item is moved up or down a spot. If you do this repeatedly, hold on to your chair as  you might become dizzy and fall off!

 

Seriously, this probably occurs very rarely in real use, but perhaps it will point to some deeper evil in the code that may have other unwanted consequences and could thus be eradicated...

 

On second thought, it may have to do with my settings with regard to scrolling so not sure if anyone will be able to reproduce this...

 

Cheers!