Hudson 1.85 is still not working with (experimental) Maven project mode.

Windows 2003 Server
Tomcat 5.5
Java 1.5.0_09
Maven 2.0.5

It does not even get out of the gate!

started
[test-project] $ C:\sun\jdk1.5.0_09\jre\bin\java -cp "C:\Program Files\Apache
Software Foundation\Tomcat
5.5\webapps\hudson\WEB-INF\lib\maven-agent-1.85.jar;C:\Program Files\Apache
Software Foundation\maven-2.0.5\core\boot\classworlds-1.1.jar"
hudson.maven.agent.Main "C:\Program Files\Apache Software
Foundation\maven-2.0.5" "C:\Program Files\Apache Software Foundation\Tomcat
5.5\webapps\hudson\WEB-INF\lib\hudson-core-1.85.jar" "C:\Program Files\Apache
Software Foundation\Tomcat
5.5\webapps\hudson\WEB-INF\lib\maven-interceptor-1.85.jar"
Exception in thread "main" java.lang.NoClassDefFoundError:
edu/emory/mathcs/backport/java/util/concurrent/Executor
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2395)
at java.lang.Class.getMethod0(Class.java:2642)
at java.lang.Class.getMethod(Class.java:1579)
at hudson.maven.agent.Main.main(Main.java:57)
at hudson.maven.agent.Main.main(Main.java:30)
FATAL: unexpected stream termination
java.io.EOFException: unexpected stream termination
at hudson.remoting.Channel.<init>(Channel.java:142)
at hudson.Launcher$LocalLauncher.launchChannel(Launcher.java:166)
at hudson.maven.MavenBuild$RunnerImpl.doRun(MavenBuild.java:198)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:117)
at hudson.model.Run.run(Run.java:549)
at hudson.maven.MavenBuild.run(MavenBuild.java:98)
at hudson.model.Executor.run(Executor.java:61)