Welcome to Quantal Quetzal Alpha 3 image set, which will in time become the 12.10 release.
Pre-releases of Quantal Quetzal are *not* encouraged for anyone needing a stable system or anyone who is not comfortable running into occasional, even frequent breakage. They are, however,recommended for Ubuntu developers and those who want to help in testing, reporting, and fixing bugs as we work towards getting this release ready.