I just want to mention - if you want some of those things, such as in-line reply, collapsible comments, CSS fixes (quoting in particular) and new comment indicators, try HNES for Chrome (https://chrome.google.com/webstore/detail/hacker-news-enhanc...) - it makes using the site much more pleasant.

Edit: Was viewing this out of context - there is another mention of HNES up top, I apologize for the repetition.