JRuby 1.3.0RC1 搞定了一些与 Google App Engine (GAE/J) 有关的 issue。我们决定发布一个更“短”的版本，这样子对 GAE/J 感兴趣的用户就不需要抓版本库构建一遍 JRuby 了。 译注：版本库里 10000 多个文件！
 
JRuby 1.3.0RC1 is a release to fix some issues which prevented JRuby from working with Google App Engine (GAE/J).  We decided to put out a shorter release so that users interested in GAE/J could get going without needing to build JRuby from scratch.
亮点：
 
◆一些修改，使得 JRuby 在一些受限环境内（如 GAE/J）跑得更顺
 
◆访问 Java 原生数组大约快 10 倍
 
◆timeout.rb 现在快了约 40% [ 译注：这话说的…… 难不成指定 10 秒你当 6 秒？ ]
 
◆irb 现在工作在 1.9 模式了；另外也有一些杂七杂八的 1.9 相关的修正
 
◆集成 rubygems 和 rspec 分别升级到 1.3.2 和 1.2.6
 
◆修了 1.2.0 以来的 22 个 bug
 
完成的 Issue 小结：
 
JRUBY-3566     bug in multiplication
 
JRUBY-1401     Pathname#realpath fails for Windows drive letters
 
JRUBY-3490     Object#instance_exec only works with blocks of 3 parameters or less?!
 
JRUBY-3423     When using ActiveSupport, YAML dump/load of 3.0 returns YAML::PrivateType
 
JRUBY-3517     Incorrect self in a multiple assignment
 
JRUBY-3514     RUBY_PATCHLEVEL should be a Fixnum instead of String
 
JRUBY-3533     YAML.load fails on Base64 encoded binary data created by yaml "Length of Base64 encoded input string is not a multiple of 4."
 
JRUBY-3516     Non-thread safe regex backrefs
 
JRUBY-2289     File.directory? returns false for directories inside a jar
 
JRUBY-3551     ConcurrentModificationException in RubyClass.invalidateCacheDescendants()
 
JRUBY-3564     UDPSocket#bind should interpret the empty string as INADDR_ANY, not loopback
 
JRUBY-3563     getsockname and getpeername should return a struct sockaddr
 
JRUBY-3511     1.2.0: jruby –1.9 picks up the wrong path for loading modules
 
JRUBY-3166     Primitive type not being boxed when implementing a Java interface.
 
JRUBY-3568     Threads don't appear to inherit the thread group of their creating thread
 
JRUBY-3599     loop does not rescue StopIteration in –1.9
 
JRUBY-3610     StringIO#read given a buffer raises ArrayIndex error
 
JRUBY-3488     trap does not handle string as second argument
 
JRUBY-3481     JRuby test: test_command_line_switches.rb fails on Oracle JRockit JVM
 
JRUBY-3537     FFI: initialize() is not called for Struct and ManagedStruct instances
 
JRUBY-3565     TCPServer should bind to INADDR_ANY given empty string as hostname