I recently upgraded my system from 12.04 to 12.10. After the upgrade process finished I used y-ppa-manager to restore working ppas. Now at some point in time that I'm not sure what happened my system was converted to 13.04 raring ringtail.
My kernel version is 3.7, lsb-release -a shows 13.04 etc.
I have no idea how this happened as I've been really busy this week and wasn't paying much attention to the terminal. Is there any way I can safely get back my system?