How to revert back to official version after updating package in Ubuntu 12.10

There is one command line tool known as ppa-purge.With the help of this we can easily revert back to official version of package even after updating.

Steps to install ppa-purge

1. Open Ubuntu Software Center   2. Install “ppa-purge”.                      
   ORClick here to download ppa-purge 
   Step to use ppa-purge
    
2. Open terminal                                                                                             
3. Type “sudo ppa-purge ppa:” for eg: sudo ppa-purge ppa:gnome3-team/gnome3