I've had to drop the ppc64 keyword from dev-ruby/rubigen-1.5.4 due to a new dependency that is not yet keyworded for ppc64: dev-ruby/shoulda-0.10.3 Please test and re-keyword both packages.
This stabilization also affects dev-ruby/adhearsion-0.8.3-r1, which had its ppc64 keyword dropped due to this bug still being open.
~ppc64 done; closing as last arch