ChiliProject is not maintained anymore. Please be advised that there will be no more updates.
We do not recommend that you setup new ChiliProject instances and we urge all existing users to migrate their data to a maintained system, e.g. Redmine. We will provide a migration script later. In the meantime, you can use the instructions by Christian Daehn.
Cannot unlock a forum thread (Bug #984)
Once a thread is locked, it can not be unlocked currently.
The "Locked" checkbox is present in the edit form and can be unchecked. But after submission of the form, the thread does not get unlocked. On reloading of the form, the "Locked" checkbox is checked again.