I noticed a post that had the 

> marked as duplicate by:...


But the 

    Possible Duplicate:
    .....

in the answer 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 roll backing, and re-aded the duplicate stamp.