There is an ongoing outage on the primary CPAN mirror. It is possible to work around the issue by using MetaCPAN as a mirror.

DOHERTY / File-Symlink-Atomic-0.002 / Changes 
Revision history for Perl module File-Symlink-Atomic

0.002     2012-06-12
  - Bail unless it is a Unix-ey platform [GH #2]

0.001     2012-06-10
  - Initial revision