Hi Luis, On 16.10.2010 21:15, Luis Lavena wrote: > You're receiving this because the gem that you're trying to use has > been compiled for Ruby 1.8.x and these binaries are not compatible > with Ruby 1.9.x I've followed your replies here and also on -core and you seem to be very knowledgeable about Ruby. One thing I noticed about many (mostly Windows) related questions from user was that they would happen to mix different binary Ruby versions; accidentally. Is there no mechanism for gems to depend on specific Ruby version and arch-types for binaries (sometimes even sources) ? thanks, - Markus