I have repeatedly tried to set the Maven Home, with little success.

ERROR: Maven 'Maven 2.0.7' doesn't have its home set
ERROR: Processing failed due to a bug in the code. Please report thus to
users@hudson.dev.java.net
hudson.model.Run$RunnerAbortedException
at hudson.maven.MavenProcessFactory.buildMavenCmdLine(MavenProcessFactory.java:83)
at hudson.maven.MavenProcessFactory.newProcess(MavenProcessFactory.java:57)
at hudson.maven.ProcessCache.get(ProcessCache.java:166)
at hudson.maven.MavenModuleSetBuild$RunnerImpl.doRun(MavenModuleSetBuild.java:300)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:192)
at hudson.model.Run.run(Run.java:649)
at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:172)
at hudson.model.ResourceController.execute(ResourceController.java:70)
at hudson.model.Executor.run(Executor.java:62)