The following script seems to work with ruby version 1.6.5, but not with 1.6.6. 
Is this a bug or new "correct behavior"?

-----------------------------------------
#!/usr/bin/env ruby

class MyClass
    def initialize
        @data = [1, 2, 3]
    end

    def each
        @data.each
    end
end

myc = MyClass.new

myc.each { |x| print x, "\n" }
--------------------------------------------

RESULT ruby 1.6.5

1
2
3

RESULT ruby 1.6.6

../t.1:9:in `each': no block given (LocalJumpError)
        from ./t.1:9:in `each'
        from ./t.1:15


Passing the block explicitly solves the problem, but obviously is not quite as
clean.

----------------------------------
#!/usr/bin/env ruby

class MyClass
    def initialize
        @data = [1, 2, 3]
    end

    def each(&block)
        @data.each(&block)
    end
end

myc = MyClass.new

myc.each { |x| print x, "\n" }
------------------------------------


Thanks in advance,

Matt