FindBugs
The use of FindBugs is good advice though - as I detailed here on RegDeveloper a while ago: http://www.regdeveloper.co.uk/2006/06/15/findbugs_pan/
6 publicly visible posts • joined 1 Sep 2006
The Other Steve -
Unfortunately this is an area where things are changing pretty fast. The tutorial uses what's in the current pre-packaged releases of NetBeans 6.0 and the Ruby Pack - in other words this is still version 1.0.x of JRuby and 1.2.3 of RoR. As of now this is still the latest pre-packaged version of the software that comes with NetBeans.
But point taken, in general we try and keep as up to date as possible given time constraints and deadlines...
Pan