jruby -S gem update --system
is broken on rubygems 1.5.0. See
Please upgrade to rubygems 1.5.2 before next release.
gem update --system wipes out RubyGems Maven support
update --system is kinda of "broken" on JRuby anyway, since we include some tweaks for RubyGems that would get overwritten (specifically, Maven support).
We won't get 1.5.2 into RC3, but we should do it for final. Marking as such.
Just taking stock; 1.6.0 didn't ship with 1.5.2. Remarking it for 1.6.1.
RubyGems 1.8.9 (or later) will ship with JRuby 1.6.5 and 1.7.0.