Audit a Bug
Auditing a bug gives information on how a bug has changed over time.
From inside a bug's details, clicking on Audit will display a Bug Audit page.

This report shows changes to the bug, detailing:
- Who -- Username of the person who made the change.
- When -- The day/month/year a change was made.
- Column -- The value that changed.
- Old Value -- The old value of the column.
- New Value -- The new value of the column.