Not sure why it is failing here trying to parse cobertura results?

Publishing Cobertura coverage report...
Publishing Cobertura coverage results... FATAL: Unable to parse /var/lib/jenkins/jobs/project/builds/2011-08-22_04-50-31/coverage239.xml hudson.util.IOException2: Cannot parse coverage results at hudson.plugins.cobertura.CoberturaCoverageParser.parse(CoberturaCoverageParser.java:89) at hudson.plugins.cobertura.CoberturaCoverageParser.parse(CoberturaCoverageParser.java:52) at hudson.plugins.cobertura.CoberturaPublisher.perform(CoberturaPublisher.java:265) at hudson.tasks.BuildStepMonitor$3.perform(BuildStepMonitor.java:36) at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:682) at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:657) at hudson.maven.MavenModuleSetBuild$RunnerImpl.post2(MavenModuleSetBuild.java:958) at hudson.model.AbstractBuild$AbstractRunner.post(AbstractBuild.java:604) at hudson.model.Run.run(Run.java:1401) at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:479) at hudson.model.ResourceController.execute(ResourceController.java:88) at hudson.model.Executor.run(Executor.java:230) Caused by: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Invalid byte 2 of 2-byte UTF-8 sequence. at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source) at org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown Source) at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source) at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source) at org.apache.xerces.impl.XMLVersionDetector.determineDocVersion(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source) at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source) at org.apache.xerces.jaxp.SAXParserImpl.parse(Unknown Source) at javax.xml.parsers.SAXParser.parse(SAXParser.java:195) at hudson.plugins.cobertura.CoberturaCoverageParser.parse(CoberturaCoverageParser.java:81) ... 11 more