Trouble deploying Rails 3.2.6 app with Capistrano - ruby-on-rails-3

Question

I've setup my Linode VPS properly with nginx, passenger, ruby 1.9.3-p194, and rails 3.2.6. I've built a simple Cap recipe (see below) which passes deploy:setup and deploy:check but fails on the assets precompile phase. I would try to run the precompile by hand on the remote server but Cap rollsback so I can't do it.
The error looks like a PG error however I've tested a connection manually to the server based off my database.yml settings and it works perfect. Any idea what this could be?
deploy.rb
require "bundler/capistrano"
server "50.116.25.145", :web, :app, :db, primary: true
set :application, "exigencad"
set :user, "deploy"
set :deploy_to, "/home/#{user}/#{application}"
set :deploy_via, :remote_cache
set :use_sudo, false
set :scm, "git"
set :repository, "git#github.com:teknull/#{application}.git"
set :branch, "master"
default_run_options[:pty] = true
ssh_options[:forward_agent] = true
after "deploy", "deploy:cleanup" # keep only the last 5 releases
namespace :deploy do
task :start do ; end
task :stop do ; end
task :restart, :roles => :app, :except => { :no_release => true } do
run "#{try_sudo} touch #{File.join(current_path,'tmp','restart.txt')}"
end
end
task :after_update_code do
run "ln -nfs #{deploy_to}/shared/config/database.yml #{release_path}/config/database.yml"
end
after :deploy, "assets:precompile"
Error from Capistrano:
executing `deploy:assets:precompile'
* executing "cd /home/deploy/exigencad/releases/20120621170601 && bundle exec rake RAILS_ENV=production RAILS_GROUPS=assets assets:precompile"
servers: ["50.116.25.145"]
[50.116.25.145] executing command
** [out :: 50.116.25.145] rake aborted!
** [out :: 50.116.25.145] FATAL: Peer authentication failed for user "exigen"
** [out :: 50.116.25.145]
** [out :: 50.116.25.145] Tasks: TOP => environment
** [out :: 50.116.25.145]
** [out :: 50.116.25.145] (See full trace by running task with --trace)
command finished in 6433ms
*** [deploy:update_code] rolling back

Answer 1

might be totally unrelated to your problem, but since i just hit the same error while running cap deploy:migrate i'll mention it.
did you set host: localhost for your production db in database.yml?
adding that line fixed the problem for me.

Answer 2

Try add config.assets.initialize_on_precompile = false to your application.rb file,that help me.