Steps to reproduce:
gem install activerdf
gem install activerdf_rdflite
cd some/rails/app
script/server
Causes
** Loading any Rails specific GemPlugins
Exiting
/opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require': no such file to load -- active_rdf (MissingSourceFile)
from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'
from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require'
from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in'
from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require'
from /opt/local/lib/ruby/gems/1.8/gems/activerdf_rdflite-1.4.1/lib/activerdf_rdflite/rdflite.rb:6
from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'
from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'
from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require'
... 33 levels...
from /opt/local/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/commands/server.rb:39
from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'
from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'
from script/server:3
