What did you do to cause this? Clicked Delete beside an existing Milestone.
What page were you on? https://my.site.com/traq/nbs_db/settings/milestones
What PHP and MySQL versions do you run? PHP 5.3.17 MySQL 5.5.27-log Apache 2.2.3 RHEL 5.8
I am able to edit the Milestone, just cannot delete it.
That's no bug, the functionality is not done yet.