Should I install ruby 1.9?

I've updated rails to 2.3.2, should I update ruby to 1.9?

What are the advantages/disadvantages in doing so?

Ruby 1.9 is the new kid on the block. It's where the future of ruby is
headed and at a basic level is faster than ruby 1.8.x. Not everything
is ready for it yet though (while rails is, your code or gems that you
use may not be ready yet).

Fred