Do you write comments, and then not submit them?
CyberFonic: I tend to read Hacker News in bulk, that is, I ctrl-right click on links and then read them.  By the time I get around to some entries and write a comment, it has expired and won't take.If I think what I wrote is good I might go back and find the entry again and resubmit.  Other times I just shrug and skip it.Would be Real Nice if comments didn't time out / expire.