Following up this thread (which has been locked):
All the suggested sizes on this thread still leave black lines, either horizontally or vertically. The thumbs along the bottom seem to be a different ratio to the highlighted thumb top left. Can someone please clear up what the native sizes of each of these are? I am trying to make custom thumbs for my folders and the black lines are really annoying me.
I am using the default theme and the (yellow) list view on the largest setting.