Looks like there may be a problem with Rake 0.6.2 and Ruby 1.8.4. If  
I have a task that uses either chdir or cd, I get an error:

   rake aborted!
   no such option: noop
   /Users/jamis/ruby184/lib/ruby/1.8/fileutils.rb:1422:in  
`fu_check_options'
   /Users/jamis/ruby184/lib/ruby/1.8/fileutils.rb:119:in `cd'
   /Users/jamis/ruby184/lib/ruby/gems/1.8/gems/rake-0.6.2/lib/rake.rb: 
640:in `cd'
   ./rakefile:67

Apparenly, FileUtils.chdir doesn't take the :noop parameter anymore?  
I'm working around this by just invoking FileUtils.chdir directly.

- Jamis