"Problema encoding" iReport + JSF + PrimeFaces

Assuntos Gerais
#1

Acho que seja mesmo um problema de encoding, vejam o stacktrace:

net.sf.jasperreports.engine.JRException: com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException: Invalid byte 1 of 1-byte UTF-8 sequence.
	at net.sf.jasperreports.engine.xml.JRXmlLoader.loadXML(JRXmlLoader.java:251)
	at net.sf.jasperreports.engine.xml.JRXmlLoader.loadXML(JRXmlLoader.java:230)
	at net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:218)
	at net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:172)
	at net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:156)
	at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:143)
	at base.util.RelatorioUtil.geraNewRelatorio(RelatorioUtil.java:65)
	at base.model.managedbean.ContatoBean.getArquivoRetorno(ContatoBean.java:60)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at javax.el.BeanELResolver.getValue(BeanELResolver.java:62)
	at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
	at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
	at org.apache.el.parser.AstValue.getValue(AstValue.java:118)
	at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
	at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109)
	at org.primefaces.component.filedownload.FileDownloadActionListener.processAction(FileDownloadActionListener.java:52)
	at javax.faces.event.ActionEvent.processListener(ActionEvent.java:88)
	at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:769)
	at javax.faces.component.UICommand.broadcast(UICommand.java:300)
	at javax.faces.component.UIData.broadcast(UIData.java:1093)
	at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794)
	at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259)
	at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
	at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Unknown Source)
Caused by: com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException: Invalid byte 1 of 1-byte UTF-8 sequence.
	at com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.invalidByte(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.read(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.load(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.arrangeCapacity(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.skipString(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLVersionDetector.determineDocVersion(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
	at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
	at org.apache.commons.digester.Digester.parse(Digester.java:1745)
	at net.sf.jasperreports.engine.xml.JRXmlLoader.loadXML(JRXmlLoader.java:243)
	... 40 more

Não. No meu relatório não tem nenhum caracter especial!

O erro acontece nesse ponto do código:

O relatório nem é criado ainda!
Alguem pode me dizer o que está acontecendo?

#2