```
:content-type => content_type
```

caused the following error:

```
$ dpl --provider=s3 --access-key-id=xxx --secret-access-key=xxx --bucket=dev.wsrcdn.net --local-dir=build --upload-dir=dobbins/test/
Installing deploy dependencies
Preparing deploy
Logging in with Access Key: ****************D5WQ
No local changes to save
Deploying application
/Users/johnny.dobbins/.rvm/gems/ruby-2.0.0-p247/gems/dpl-1.5.2/lib/dpl/provider/s3.rb:36:in `block (2 levels) in push_app': undefined local variable or method `type' for #<DPL::Provider::S3:0x007f800f8e1cf0> (NameError)
        from /Users/johnny.dobbins/.rvm/gems/ruby-2.0.0-p247/gems/dpl-1.5.2/lib/dpl/provider/s3.rb:34:in `glob'
        from /Users/johnny.dobbins/.rvm/gems/ruby-2.0.0-p247/gems/dpl-1.5.2/lib/dpl/provider/s3.rb:34:in `block in push_app'
        from /Users/johnny.dobbins/.rvm/gems/ruby-2.0.0-p247/gems/dpl-1.5.2/lib/dpl/provider/s3.rb:33:in `chdir'
        from /Users/johnny.dobbins/.rvm/gems/ruby-2.0.0-p247/gems/dpl-1.5.2/lib/dpl/provider/s3.rb:33:in `push_app'
        from /Users/johnny.dobbins/.rvm/gems/ruby-2.0.0-p247/gems/dpl-1.5.2/lib/dpl/provider.rb:95:in `block in deploy'
        from /Users/johnny.dobbins/.rvm/gems/ruby-2.0.0-p247/gems/dpl-1.5.2/lib/dpl/cli.rb:41:in `fold'
        from /Users/johnny.dobbins/.rvm/gems/ruby-2.0.0-p247/gems/dpl-1.5.2/lib/dpl/provider.rb:95:in `deploy'
        from /Users/johnny.dobbins/.rvm/gems/ruby-2.0.0-p247/gems/dpl-1.5.2/lib/dpl/provider/s3.rb:42:in `deploy'
        from /Users/johnny.dobbins/.rvm/gems/ruby-2.0.0-p247/gems/dpl-1.5.2/lib/dpl/cli.rb:32:in `run'
        from /Users/johnny.dobbins/.rvm/gems/ruby-2.0.0-p247/gems/dpl-1.5.2/lib/dpl/cli.rb:7:in `run'
        from /Users/johnny.dobbins/.rvm/gems/ruby-2.0.0-p247/gems/dpl-1.5.2/bin/dpl:5:in `<top (required)>'
        from /Users/johnny.dobbins/.rvm/gems/ruby-2.0.0-p247/bin/dpl:23:in `load'
        from /Users/johnny.dobbins/.rvm/gems/ruby-2.0.0-p247/bin/dpl:23:in `<main>'
```

I replaced that with 

```
:content_type => content_type
```

and the problem resolved.  I'll be pushing this change up and then merging the pull request.