Ruby 1.9.1 was only a development release anyway. Ruby 1.9.2 is a full, production release (and the first of the Ruby 1.9.x releases to be so). Ruby 1.9.2 isn't particularly "in flux" but Ruby 1.9 is generally with Ruby 1.9.3 expected by the end of the year.

1.9.2 is stable. It, apparently, doesn't work perfectly on Windows though.

All of my Hackety problems on Windows? Ruby 1.9.1. Works great on Linux and Mac. Windows... not so much.

Working on the 1.9.2 port, but it's just not that simple...

Exactly ... I had this same problem on windows trying to run Rails and I just assumed it was still being worked on. My mistake.