If you go the svn route, be sure that you have all the dependencies installed. The list of dependencies follow.
AWS::S3 requires Ruby 1.8.4 or greater.
It also has the following dependencies:
sudo gem i xml-simple -ry
sudo gem i builder -ry
sudo gem i mime-types -ry
=== XML parsing (xml-simple)
AWS::S3 depends on XmlSimple (http://xml-simple.rubyforge.org/). When installing aws/s3 with
Rubygems, this dependency will be taken care of for you. Otherwise, installation instructions are listed on the xml-simple
If your system has the Ruby libxml bindings installed (http://libxml.rubyforge.org/) they will be used instead of REXML (which is what XmlSimple uses). For those concerned with speed and efficiency, it would behoove you to install libxml (instructions here: http://libxml.rubyforge.org/install.html) as it is considerably faster and less expensive than REXML.
=== XML generation (builder)
AWS::S3 also depends on the Builder library (http://builder.rubyforge.org/ and http://rubyforge.org/projects/builder/). This will also automatically be installed for you when using Rubygems.
=== Content type inference (mime-types)
AWS::S3 depends on the MIME::Types library (http://mime-types.rubyforge.org/) to infer the content type of an object that does not explicitly specify it. This library will automatically be installed for you when using Rubygems.