After upgrading to 1.393 my maven2 based builds have started failing and complain that I am using the "RELEASE" version for the maven-release-plugin. I can successfully build the same source code using maven 2.2.1 from a standalone commandline.

Note I'm pretty sure that maven3 requires that a version of each plugin is specified and will eventually go through my projects and make this change but in the meantime this is a regression that is going to confuse others who upgrade to latest Hudson.

The console output that I get is as follows:

At revision 2589
Found mavenVersion 2.2.1 from file jar:file:/var/lib/hudson/tools/Maven_2.2.1/lib/maven-2.2.1-uber.jar!/META-INF/maven/org.apache.maven/maven-core/pom.properties
Parsing POMs
ERROR: Failed to parse POMs
org.apache.maven.project.ProjectBuildingException: Some problems were encountered while processing the POMs:
[ERROR] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-release-plugin must be a valid version but is 'RELEASE'. @ line 37, column 26

at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:325)
at hudson.maven.MavenEmbedder.readProjects(MavenEmbedder.java:382)
at hudson.maven.MavenModuleSetBuild$PomParser.invoke(MavenModuleSetBuild.java:1096)
at hudson.maven.MavenModuleSetBuild$PomParser.invoke(MavenModuleSetBuild.java:983)
at hudson.FilePath.act(FilePath.java:756)
at hudson.FilePath.act(FilePath.java:738)
at hudson.maven.MavenModuleSetBuild$RunnerImpl.parsePoms(MavenModuleSetBuild.java:690)
at hudson.maven.MavenModuleSetBuild$RunnerImpl.doRun(MavenModuleSetBuild.java:526)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:417)
at hudson.model.Run.run(Run.java:1362)
at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:400)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:145)
[WARNINGS] Skipping publisher since build result is FAILURE

I have not changed any of my pom.xml files in the past month so I can be fairly sure that I didn't make a mistake there.