Overriding log_error in Rails3 not working

I have this in my application.rb: private       def log_error(exception)          super          UserMailer.error_message(exception,            clean_backtrace(exception),            session.instance_variable_get("@data"),            params,            request.env          ).deliver       end

I'd like the errors emailed to me.

It doesn't seem to be calling that "log_error" at all.

Is this done some other way in Rails3?