Support for Growl 1.3 with the gist https://gist.github.com/2030825
Either directly infused in the code or via a new gem (the gem is maybe easier to deal with).
Sorry, never had time to add this in. Growl is not used as much these days .
Attaching code as patch requested in: https://gist.github.com/2030825
This might want refactored and details for using ruby_gntp are here: https://github.com/snaka/ruby_gntp.
Might also probably need checks to make sure code isn't run on non OSX systems depending on how its integrated.