Nokogiri vs. Hpricot.
Nokogiri: [root@demon trunk]# sudo gem install nokogiri Building native extensions. This could take a while… ERROR: Error installing nokogiri: ERROR: Failed to build gem native extension. Hpricot: [root@demon trunk]# sudo gem install hpricot Building native extensions. This could take a while… Successfully installed hpricot-0.8.2 1 gem installed Installing ri documentation for hpricot-0.8.2… Installing RDoc documentation [...]