@Matthew - See my change to the description for a workaround for upgrading from Quantal to Raring. Having a PPA enabled will not necessarily prevent you from upgrading to Raring, however they will be disabled during and after the upgrade process.
@Matthew - See my change to the description for a workaround for upgrading from Quantal to Raring. Having a PPA enabled will not necessarily prevent you from upgrading to Raring, however they will be disabled during and after the upgrade process.