Running Jenkins 1.505 on CentOS 6.2 Linux x86_64 under apache-tomcat-7.0.29. Clover plug-in version 4.0.6. I have the CLOVER license string set in the global Jenkins config.

My build job is free-style, and I have an build step "invoke Ant" using Ant 1.8.4. I have Clover enabled in the Build Environment section checked as follows:

[ * ] Automatically record and report Code Coverage using Clover. Currently for Ant builds only.
Generate an historical report [ * ]
Generate a json report [ * ]

I get this error when I run the build job after SCM update and before the Ant build step:

...
FATAL: Index: 2, Size: 2
java.lang.IndexOutOfBoundsException: Index: 2, Size: 2
at java.util.ArrayList.RangeCheck(ArrayList.java:547)
at java.util.ArrayList.get(ArrayList.java:322)
at hudson.plugins.clover.CloverBuildWrapper$CloverDecoratingLauncher.decorateArgs(CloverBuildWrapper.java:188)
at hudson.plugins.clover.CloverBuildWrapper$CloverDecoratingLauncher.launch(CloverBuildWrapper.java:163)
at hudson.Launcher$ProcStarter.start(Launcher.java:353)
at hudson.Launcher$ProcStarter.join(Launcher.java:360)
at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:91)
at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:60)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:19)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:814)
at hudson.model.Build$BuildExecution.build(Build.java:199)
at hudson.model.Build$BuildExecution.doRun(Build.java:160)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:593)
at hudson.model.Run.execute(Run.java:1567)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:237)

Thanks for advice/help on this.
-Greg