I am trying to modify page displaying a given item-set, and all my changes in code seem pointless. I have modified the omeka/site/item-set/browse.phtml file, even tried to remove it, and nothing seem to happen.
Item sets on the public site display as a listing of the items they contain, so they’re actually controlled by the item browse view. You’ll see in there that there’s an item set variable that gets set if it’s an item set being displayed, to show the set metadata.