Successfully emerged these packages on ppc-macos. dev-ruby/rails-0.14.3 dev-ruby/activerecord-1.13.0 dev-ruby/rubygems-0.8.11-r1 dev-ruby/activesupport-1.2.3 dev-ruby/actionmailer-1.1.3 dev-ruby/actionpack-1.11.0 dev-ruby/rake-0.6.2 dev-ruby/actionwebservice-0.9.3
IMHO this bug is obsolete now. :-)
out of date. If still an issue, please test with recent versions.