Owner for some dirs of old releases being changed to root?

[Roy Miller]

I'm using 3.1.0 at the moment, deploying to Ubuntu 13.10. My deploy.rb file sets :keep_releases to 5.

When I deploy, sometimes (I hate that) Cap can't delete a subdir in /var/www/myapp/releases/2014.../public/uploads. That subdir starts its life as owned by deploy/deployer, but in the oldest release (the one Cap is trying to delete) it gets reset to root/deployer. The root user is in the deployer group, but the file permissions are thusly:

drwxr-sr-x 2 root   deployer 4096 Jun 27 06:42 0a1aa729184a8f5ea35dac525ab9f97a

Without group write permissions for the subdir, Cap won't be able to delete it. But as I said, the group of the subdir is being changed somehow from deploy to root.

Is Cap doing this? If so, can I stop it? The maddening thing is that it doesn't seem to happen all the time, but when it does, it kills the deploy.