Before reporting a bug, it is best to verify that the problem is actually caused by a previously unknown bug in the Challenger server. Several resources are available to help with this task:

The Roxen Challenger FAQs

Lists of Frequently Asked Questions exist on the Roxen web site.

The Roxen Challenger mailing list

You may want to join the Roxen Challenger mailing list, where users of Roxen Challenger help each other. Challenger developers follow the mailing list and will take note of any bugs reported on it. It is also possible to browse the archive of old messages. Refer to the contact page at the Roxen web site.