I often read HN at work. The page interface is very simple but the bright color of visited links makes it easy to navigate and spot new top stories.
The problem occurs when I go back home and check if any interesting news were added. I have to navigate through a long list of links and the only way of knowing if anything new popped up is to read all the titles again.
It would be helpful if HN could memorize visited articles and change the link color accordingly regardless of the browser history.