I don’t know anything about any of the bug trackers. If we were to have one, we would have to make a thoroughly researched choice.
We’re managing pretty well just using the forum. I’m more likely to see bugs posted in the forum, and I think other users are much more likely to help resolve and ask follow up questions here than if they were in a bug tracker. A key step is other users helping resolve the simple stuff that’s not really a bug but some misunderstanding or confusion.
I keep a list of all unresolved bugs I’ve seen on the forum. In some cases, I’m still thinking about the best design for the fix. This isn’t the kind of software where we can leave so many unresolved bugs that we need a tracker for them.
There are many, many bug trackers out there, and I’ve worked with a good bunch of them. The good thing about any of these is organization, and preventing other users from posting duplicate bug reports (well, to the point where the user looks for them first 😊 ).
But what I would really see improving things as we go on is git (or bazaar, or another decentralized source tracking system) and a door to give satoshi patches for consideration. This goes for both bugs and enhancements. In the end, as long as the sole keeper or the bitcoin key is satoshi, we just need whatever means of communication he feels better with. Forums, you say? Well, good enough, I guess.
But something like trac (http://trac.edgewall.org/) would really help keeping things organized, and I’m sure everyone would appreciate it.