After many delays, we have released FindBugs 2.0. We are pretty happy and confident about the functionality, although we know the documentation of the changes in 2.0 is lacking. We decided that releasing 2.0 took precedence over fixing the documentation. Anyone currently using FindBugs 1.3.9 should find FindBugs 2.0 to largely be a drop-in replacement that offers better accuracy and performance.
[ * ] FindBugs 2.0 http://findbugs.sourceforge.net/index.html