[0.8.0-RC1] problem with drbspec

I'm getting the following error with version 0.8.0 (I updated the gem and the rails plugin, and re-ran generate/rspec):

c:\wd\clarks>drbspec spec/models/user_spec.rb
c:/ruby/bin/drbspec:16:in `load': no such file to load -- drbspec (LoadError)
        from c:/ruby/bin/drbspec:16

the same command works fine under 0.7.5.1.  Windows XP, rails 1.2.2 and rubygems 0.9.1