I've released v1.12 of the Google::Adwords Perl module which now
has support for v13 of the Adwords API. All my sandbox tests
pass, so it should be an easy enough upgrade for you. Please use
the cpan utility to upgrade. If not, you can download it from here -
http://search.cpan.org/CPAN/authors/id/R/RO/ROHAN/Google-Adwords-v1.12.tar.gz
If you face any problems due to the upgrade, don't hesitate to
contact me directly.
Thanks,
Rohan