Everything was up and running. But I couldn't connect to a live contract made by third party. The node couldn't be found. so I followed these instructions. https://github.com/ethereum/go-ethereum/wiki/Installation-Instructions-for-Ubuntu
I'm an ubuntu noob. While at the beginning I downloaded MIST manually, this second procedure was made via terminal, doing thing I can't understand. Today I open MIST and I see the MENU develope>network>testnet isn't highlighted (new feature or what?). I digit ctrl+alt+2 and I am asked to insert th password (new feature or what?). Mist switches to testnet, and after one second crashes. What should I do? I s it a testnet problem or is it the last procedure I made that introduced an issue? Any idea? should I reinstall ubuntu?