So, in 1.9 it appears that the Fiber class exists before you've required fiber. Thoughts? irb(main):001:0> Fiber => Fiber irb(main):002:0> Fiber.current NoMethodError: undefined method `current' for Fiber:Class from (irb):2 from /Users/rogerpack/19/bin/irb:12:in `<main>' irb(main):003:0> require 'fiber' => true irb(main):004:0> Fiber.current => #<Fiber:0x11bb10> And, oddly, only fiber.bundle exists, not fiber.rb is this more like 'supplemental fiber methods' or something? Anyway it works, I'm just curious. Thanks! -R -- Posted via http://www.ruby-forum.com/.