The ruby team intends to file a stable request for ruby 1.9 in a week or
so. Most packages using ruby use the ruby-ng and ruby-fakegem eclasses
where the RUBY_TARGETS mechanism selectively handles ruby 1.9
compatibility. However, there are also packages depending directly on
dev-lang/ruby, and some of these may have compatibility issues. If you
are maintaining such a package, then please have a look at
compatibility, preferably before we file the stable request.