Windows oddity

C:\dev\ruby\old\os>ruby -v go.rb *.gemspec
ruby 1.9.1p378 (2010-01-10 revision 26273) [i386-mingw32]
[“os.gemspec”]

C:\dev\ruby\old\os>jruby2 -v go.rb *.gemspec

C:\dev\ruby\old\os>C:\dev\ruby\downloads\jruby\bin\jruby -v go.rb
.gemspec
jruby 1.6.0.dev (ruby 1.8.7 patchlevel 249) (2010-05-13 3f3574e) (Java
HotSpot™ Client VM 1.6.0_18) [x86-java]
["
.gemspec"]

Anybody have any ideas here?
Thanks.
-rp