http://www.cs.wisc.edu/coral/coral.bugreport.html
Or post onto the newsgroup comp.lang.misc, and mention Coral in the subject line.
Your e-mail address:
Machine and OS Type: HP-UX 9.X Sun-OS 4.1X Sun Solaris Solaris (for PC-compatibles) Linux Other (please specify in comment)
Version of Coral: 1.2 1.5 Unknown / Unsure