Apparently it's too hush-hush to share with the public, and that conveniently fits with their
plans to shut out CB++ (except when it suits their purposes, like porting features...).
The relevant Bukkit Staff policy, in a nutshell, is:
"we will mark tickets private if there is even a hint that it may be damaging to the community as a whole" - TnT
It begs the question: Is it reasonable to suppress stuff in a public project (Bukkit) like this?
I don't see see it happening on Spout JIRA (yet)...
(But as md_5 said, it's probably still visible in the commit history,so anyone who knows what
they're looking for could still work it out I suppose).