The recently uploaded 2.0.2 gems, apparently generated with rubygems 0.9.5, are missing a platform specification, which confuses older versions of rubygems. The following illustrates what happens when one attempts to install Rails 2.0.2.
Select which gem to install for your platform (i486-linux)
1. rails 2.0.2 ()
2. rails 2.0.1 (ruby)
3. rails 2.0.0 (ruby)
...
> 1
Select which gem to install for your platform (i486-linux)
1. activesupport 2.0.2 ()
2. Cancel installation
> 1
ERROR: While executing gem ... (OpenURI::HTTPError)
404 Not Found
According to http://www.dcmanges.com/blog/rubygems-0-9-5-platform-bug , this can be worked around by explicitly setting a platform in the gem specification. ActionPack and ActionMailer already do this, but the rest of the components do not. The attached patch adds the platform to ActiveSupport, ActiveRecord, ActiveResource, and Railties.
I would argue that this problem is severe enough to justify another release, as upgrading rubygems is not always an option.
