When i emerged dev-ruby/ruby-gtk2-0.14.1, i got this error: /usr/lib/ruby/site_ruby/1.8/gdk_pixbuf2.rb:2:in `require': no such file to load -- gdk_pixbuf2.so (LoadError) from /usr/lib/ruby/site_ruby/1.8/gdk_pixbuf2.rb:2 from /usr/lib/ruby/site_ruby/1.8/gtk2.rb:9 from /usr/bin/booh:26 I solved the problem by emerging dev-ruby/ruby-gdkpixbuf2. Shouldnt ruby-gtk2 require ruby-gdkpixbuf2?
Added the dep - thanks for the report.