There is an interesting project on KickStarter that is close to run out of time.
I'm not the owner of the project, but I'm backing it and would be disappointed to see it fail.

Please see if you would like to participate:
http://www.kickstarter.com/projects/Musopen/open-source-bug-tracking

It is hard to compete with already existing open source solution like mantis. Even if mantis has its short comings, who guarantees that this new bug tracking tool will be better.

So they put a web 2.0 interface over bug tracking? Big deal.

I want my bug tracker to have features, not eye candy. If they were addressing commonly-agreed deficiencies in existing bug-tracking solutions, I'd be all for it, but I don't see anything like that.