NUnit plugin chokes on the report xml with the following error:

ERROR: Publisher hudson.plugins.nunit.NUnitPublisher aborted due to exception
hudson.util.IOException2: Could not transform the NUnit report. Please report this issue to the plugin author
at hudson.plugins.nunit.NUnitArchiver.invoke(NUnitArchiver.java:60)
at hudson.plugins.nunit.NUnitArchiver.invoke(NUnitArchiver.java:26)
at hudson.FilePath.act(FilePath.java:757)
at hudson.FilePath.act(FilePath.java:739)
at hudson.plugins.nunit.NUnitPublisher.perform(NUnitPublisher.java:102)
at hudson.tasks.BuildStepMonitor$3.perform(BuildStepMonitor.java:36)
at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:644)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:623)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:601)
at hudson.model.Build$RunnerImpl.post2(Build.java:159)
at hudson.model.AbstractBuild$AbstractRunner.post(AbstractBuild.java:570)
at hudson.model.Run.run(Run.java:1386)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:145)
Caused by: org.xml.sax.SAXParseException: Content is not allowed in prolog.
at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(Unknown Source)
at javax.xml.parsers.DocumentBuilder.parse(Unknown Source)
at hudson.plugins.nunit.NUnitReportTransformer.splitJUnitFile(NUnitReportTransformer.java:100)
at hudson.plugins.nunit.NUnitReportTransformer.transform(NUnitReportTransformer.java:71)
at hudson.plugins.nunit.NUnitArchiver.invoke(NUnitArchiver.java:55)
... 14 more