Issue #996 has been updated by Chauk-Mean Proum. As I indicated, it worked also for me with ruby-1.9.1-preview2 : ruby 1.9.1 (2008-12-01 revision 20438) [i386-mingw32] It doesn't work anymore with ruby-1.9.1-rc1 : ruby 1.9.1 (2008-12-30 patchlevel-0 revision 21203) [i386-mingw32] The difference of revision numbers between your build and mine is a bit strange. But I think that you don't use ruby-1.9.1-rc1 given the date version of your build. Note that I'm using the tarball from the ruby-lang.org ftp. ---------------------------------------- http://redmine.ruby-lang.org/issues/show/996 ---------------------------------------- http://redmine.ruby-lang.org