rawr-1.6.0 (a version I know works) plays nice with JRuby 1.5.6 and
JRuby 1.6.0, but with JRuby 1.6.1 I start seeing the "cannot load
'main'" errors. And I see that with later JRuby as well.
I need to see if this is the result of a deliberate change in how JRuby
locates Ruby files in jar files, or if this is a bug.
James