[tmiku]

Hovering over the time-ago item on the comment header displays the exact post time, and interestingly it shows times from Feb 16 (3 days ago) for many of the "2 hours ago" comments. Must be an artifact of some moderation tool.

[pixl97]

There is a feature in HN that brings stories back to the front page, can't remember what it's called at the moment, but must be because of that.