We have recently migrated our Bug Report system, because it was constantly polluted with SPAM and it was difficult to maintain. Our current system is provided by the development infrastructure (Gforge/UCLouvain).
The current bug tracking system does not allow anonymous submission. But you can do it pseudo anonymously. Just log in into Gforge/UCLouvain with the username mozart, using the same word for the password. Then, submit a new bug report on the tracker. If you already have a Gforge account, use yours instead. Feature requests can be submitted on this tracker
Useful information that will help us to verify and fix the bug:
The migration was the result of the contribution of the Mozart community. Special thanks to (in alphabetic order):