As a matter of fact, bugs are currently being fixed in a steady, perhaps even an increasing, tempo. But you're right that there should be some formal system that (1) acknowledges reported bugs, (2) makes it easy to determine who's working on a particular bug fix, and (3) clearly indicates which bugs have been fixed. I.e., what we need is a bug tracking system for Hugs.
I've been investigating some alternatives for such a system recently, but haven't yet come to any firm conclusion. The ghc team has recently moved its repository to SourceForge, though, and one of the benefits with such an arrangement is that bug tracking can be handled using the SourceForge Tracking system. From what I've heard that system is really excellent.
So I'm posing this question to the interested public: Is it time to consider moving Hugs to SourceForge too?
It's not as much of an upheaval as you might think: you don't have to move your project wholesale to SourceForge, indeed we still use the CVS repository maintained at OGI and our web pages live on haskell.org at Yale. But just by opening a project at SourceForge you get a bug tracker and various other cool gadgets, plus access to the compile farm. Cheers, Simon