Redmine

Environment:
  Redmine version                3.1.1.stable.14645
  Ruby version                   2.2.2-p95 (2015-04-13) [x86_64-linux]
  Rails version                  4.2.4
  Environment                    production
  Database adapter               PostgreSQL
SCM:
  Subversion                     1.6.11
  Git                            2.8.0
  Filesystem                    
  GitRemote                      2.8.0
Redmine plugins:
  absence_form                   0.0.1
  redmine_agile                  1.4.0
  redmine_base_deface            0.0.1
  redmine_changeauthor           1.0.1
  redmine_checklists             3.1.3
  redmine_git_remote             0.0.1
  redmine_hipchat                2.0.0
  redmine_login_audit            0.1.5
  redmine_maintenance_mode       2.0.1

It could be categorized as a feature, but I think it's also a defect, becouse if something is marked as a privat, shouldn't be visible for all team, doesn't matter in redmine or in hipchat. Now in hipchat it's public and everyone can read it imidiately after adding.