InstantRails 2.0 and Mongrel Server

I am puzzled as to why the following screen-shot displays the IP address
of localhost as 0.0.0.0 instead of 127.0.0.1?

C:\InstantRails20\rails_apps\blog>ruby script/server
=> Booting Mongrel (use 'script/server webrick' to force WEBrick)
=> Rails application starting on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
** Starting Mongrel listening at 0.0.0.0:3000
** Starting Rails with development environment...
** Rails loaded.
** Loading any Rails specific GemPlugins
** Signals ready. INT => stop (no restart).
** Mongrel 1.1.2 available at 0.0.0.0:3000
** Use CTRL-C to stop.
** INT signal received.
Exiting

It works though. The Rails screen comes up when I type in:

http://localhost:3000/