I noticed a post that had the > marked as duplicate by:... But the Possible Duplicate: ..... in the question wasn't there, at first I thought it was a bug, but another user informed me that it was removed in an edit. That surprised me that a user just can edit out or `Rollback to Revision X`, to an earlier time. My suggestion: make the: `Possible Duplicate:...` stamp in the answer uneditable. Only by mods or one with a high enough reputation! - http://askubuntu.com/q/231512/36315 **EDIT**: The user rolled it back again: - http://askubuntu.com/q/231512/36315 I informed the user to stop rolling back, and re-added the duplicate stamp.