I upgraded Linux Mint 17 to 17.1 on 4 Dec. 2014

I successfully upgraded Linux Mint from 17 to 17.1 yesterday by How to upgrade from Linux Mint 17 to 17.1
It says:
>As excited as we are about 17.1, upgrading blindly for the sake of running the latest version does not make much sense, especially if you’re already happy with 17 and everything is working perfectly.
But I haven’t found any problems about Linux Mint 17… I wanted to examine 17.1.
Well, it’s good to do that as a member of Linux Mint Japan Members although I’m actually a lazy member.