If you open directory containing large number of thumbnailable files, and scroll
somewhere down, window contents will scroll down as Nautilus after generating
thumbnails for currently visible images goes back to processing files earlier in
listing. This is because mime type icons are replaced with slightly larger
thumbnails, pushing rest of windows contents down. This is very annoying, making
any operation on visible files sort of cat-and-mouse game.
Solution:
Nautilus should anchor scroll position to first currently visible icon, instead
of offset from top.