Foi liberada o segundo Release Candidate do JRuby 1.1 (RC2).

O que foi alterado em relação ao RC1:

• 260 issues resolved since JRuby 1.1RC1
• Large IO refactoring
• Memory improvements for JIT'd methods:
• Control total number of methods JIT'd
• Support a JIT cache between runtimes to return permgen
• Reduce codesize of generated methods (50-70% reduction)

Fonte: http://www.infoq.com/news/2008/02/jruby-11rc2-release