gem install bluecloth --platform=ruby
... is a workaround, and suggests that the problem will be fixed once
and for all with the next release. I haven't actually tried this yet,
but if someone among us is using Windows on a daily basis, he/she
might want to give it a whirl.
Cheers,
Andrew
[1] http://deveiate.org/projects/BlueCloth/ticket/59
[2]
http://groups.google.com/group/rubyinstaller/browse_thread/thread/59f3812381a195b5/adb40d04eabefe14?lnk=gst&q=bluecloth#adb40d04eabefe14