My deploy.rb defined scm as: set :scm, 'git'
To deliver the Git details (line 45), you guys are checking for "return unless capistrano[:scm] == :git". Obviously a quick .to_sym would fix this for me and any other stringified scm people.
CapistranoMailer (the 'other' gem in the same domain as CapGun) has the 'same' problem... I've never really looked into how to fix it, because it is just a one time thing. But I'll be watching this ticket to see if you do fix it!
Fixed