Capistrano asset precompile error
===

When I use capistrano to push to my production server I get this error:

    executing "cd /var/www/my_app/releases/20120731082050 && bundle exec rake RAILS_ENV=production RAILS_GROUPS=assets assets:precompile"
    servers: ["my_app.com"]
    [my_app.com] executing command
    *** [err :: my_app.com] /usr/bin/ruby1.9.1 /var/www/my_app/shared/bundle/ruby/1.9.1/bin/rake assets:precompile:nondigest RAILS_ENV=production RAILS_GROUPS=assets
    *** [err :: my_app.com] 
    command finished in 74149ms

The precompile works despite the error. I've tried running 

    cd /var/www/my_app/releases/20120731082050 && bundle exec rake RAILS_ENV=production RAILS_GROUPS=assets assets:precompile 

On the server and it works but it prints this to the console:

    /usr/bin/ruby1.9.1 /var/www/my_app/shared/bundle/ruby/1.9.1/bin/rake assets:precompile:nondigest RAILS_ENV=production RAILS_GROUPS=assets

which matches the capistrano output (Notice the addition of 'nondigest' from the original call. I know it's not a fatal error because it still works but how would I stop it from printing this error?