Fails:

--> Working on http://github.com/vti/underscore-perl/tarball/master Fetching http://github.com/vti/underscore-perl/tarball/master ... OK C:\Program Files\GnuWin32\bin\tar.exe: Unknown file type 'g' for pax_global_header, extracted as normal file ! Bad archive: master ! Failed to unpack master: no directory ! Failed to fetch distribution

This under Vista---perhaps another windows blindspot developer?