If you want to report a bug in Crystal Space first check if the bug is not already reported here. If not then you can report a new bug at this location. When reporting a bug please make sure to fill in all the relevant fields and be very precise about how to reproduce the bug. A code sample, test level, and/or screenshot is very welcome. Also make sure to mention your operating system, compiler, type of 3D card, and OpenGL driver version (read more about how to report bugs here.
For Crystal Entity Layer and Crystal Core there are separate bug trackers. Here is the full list of all bug trackers:
|Crystal Space||View tickets||Report new|
|Crystal Entity Layer||View tickets||Report new|
|Crystal Core||View tickets||Report new|
|The whole homepage||View tickets||Report new|