I think you are talking about this one: http://askubuntu.com/q/373098/169736

**I** asked "why you changed your accepted answer?" because you did **twice**. One to change from Radu's answer to mine, and another to change from mine to Radu's. Then I saw that you commented Radu's answer to get help with http://askubuntu.com/q/372988/169736 . Is odd that when someone change accepted answers so frequent one gets to wonder "why", "what is this user doing", "did any of them didn't do the work", "why not comment", **"what answer was really the one that solved OP's problem"**.

The timeline of the question: http://askubuntu.com/posts/373098/timeline

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  [1]: https://i.sstatic.net/rZXe0.png