Hi,

In message "Re: [ruby-core:26540] [Bug #2336] pathname compare fails in windows"
    on Thu, 5 Nov 2009 04:48:46 +0900, Roger Pack <redmine / ruby-lang.org> writes:

|>> Pathname.new('c:/').relative_path_from Pathname.new('/')
|ArgumentError: different prefix: "c:/" and "/"

Could you tell me what did you expect from above code?
For me, Windows ignorant, the error seems natural consequence from
#relative_path_from.

							matz.