I've just never heard of it.
Do most HN readers have the impression that polls like this are made by some some all-knowing, perfectly fair, professional editor who only puts up well researched, carefully thought out, scientific and objective options in their polls?
It might surprise you, but I'm just another HN reader just like yourself.
I woke up today and thought, "Hey, I'd like to know what other HN readers consider good bugtrackers. Why don't I put up a poll?"
I remembered the names of a few of bugtrackers off the top of my head, but just having a few would make for a pretty lame poll. So I pulled up the wikipedia article on the comparison of bug trackers. It had a million listed, so I thought that might make for too long a poll. So I chose the ones I personally heard of, and added an "Other" category for the rest.
I hope that clears up some of the mystery.
One reason why I found JIRA's omission so surprising is it's widely used by companies that have different departments or roles. It typically becomes the default choice when a company gets large enough to have a PM. Github doesn't scale with roles (yet). JIRA is so common, I'm curious what part of our industry you hang out in to know what growth Atlassian still has :) You probably use tools everyday that I'm also unfamiliar with -- we simply have different experiences.
Disclaimer: Atlassian is about to go public... so I've been doing my research on whether to buy.
And for agile/scrum, Greenhopper is absurdly bad, for the same reason.
Until recently, my team was the only developer group in our company using an issue tracker. Management have decided that every team must now use an issue tracker and that tracker must be HP Quality Center. They're even paying a temp to manually migrate all our Jira issues into QC. We managed to win the battle for Git over IBM Rational ClearCase for a version control system but this kind of thing makes me think it's about time to find a new job.