when i open up a server it says i am pretending to be 1.7.7

Put the summary of the bug you're having here

*What I expected to happen was open the server

Describe what you thought should happen here
the server will just open up like usual

*What actually happened was it would say pretending to be 1.7.7
Describe what happened here I opened up my mine craft and I went into multiplayer opened up the au server and it said pretending to be 1.7.7

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. I don't know how to trigger the bug
3. ...