You may add bugs to the bug tracker at the our Eventum page. You may create an account there and thus be able to track your submissions. Work may be done on an anonymous reporting page in the future.
The URL for the project page is: http://helpcenterlive.com/eve
When posting a bug, it's usually good form to search the bugs and ensure that no one else has posted it. If they have, and you have further information, please feel free to add a comment. It may be that you have the information we need to track it down.
If you have a new bug, please include as much information as possible. Include the version of HCL your using, and if possible the version numbers of PHP, MySQL, and what webserver. Be detailed. Again, the more information we have, the more likely we can track down the bug.
If we can not find the bug, and it appears to be a local issue, this forum is for you. Also, once a bug is posted feel free to discuss it in this forum. Bugs rarely live long in the light of day, but sometimes a hotfix is needed until the next release of HCL. This will help ensure that Bugs are where the developers can find them, but still leverage the community for help.
EDIT: Updated bug reporting site.